Patent Publication Number: US-10323822-B2

Title: Lighting arrangement, construction kit for a lighting arrangement, and method for constructing a lighting arrangement

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims the benefit of German patent application No. 10 2016 219 697.9, filed Oct. 11, 2016, the entire disclosure of which is herein incorporated by reference. 
     FIELD OF THE INVENTION 
     The invention relates to a lighting arrangement, a construction kit for a lighting arrangement, and a method for constructing a lighting arrangement. 
     TECHNICAL BACKGROUND 
     In offices, private living spaces, exhibition spaces, retail spaces, and many other spatial areas, endeavors are often made to illuminate in a targeted manner one specific spatial region, or a plurality of specific spatial regions, articles situated in the space, objects suspended from a wall of the space or architectural features of the space. For this purpose, in a conventional manner, emitters secured at a ceiling of the space, for example, are often used, said emitters being aligned with the desired spatial region or the desired object. However, depending on the viewing direction, an observer situated in the space may be dazzled by such conventional emitters or at least perceive the directly visible light source as unattractive or disturbing. 
     An improved lighting arrangement is to be proposed which at least largely avoids such disadvantages. 
     SUMMARY OF THE INVENTION 
     Against this background, an idea of the invention is to specify a lighting arrangement which has expedient glare reducing properties and offers the user high flexibility in the endeavored lighting of objects and/or spatial regions. Moreover, it is an aspect of the invention to specify a construction kit for a lighting arrangement improved in this way, and an improved method for constructing a lighting arrangement. 
     Accordingly, a lighting arrangement is proposed which comprises a channel having an interior and a light exit region. The lighting arrangement furthermore comprises at least one light providing device, wherein the light providing device is designed for arrangement thereof within the interior for the directional emission of light during operation through the light exit region toward the outside. According to the invention, the lighting arrangement comprises at least one busbar designed for the supply of the light providing device in the interior of the channel, wherein the light providing device is electrically coupleable to the busbar. According to the invention, it is proposed that the light providing device, for the holding thereof, is coupleable to the channel and is freely positionable at least within a region of the interior. 
     Furthermore, a construction kit for such a lighting arrangement is proposed. The construction kit comprises components for forming a channel having an interior and a light exit region and also at least one light providing device. In this case, the light providing device is designed for arrangement thereof within the interior for the directional emission of light during operation through the light exit region toward the outside and is furthermore configured in such a way that the light providing device, for the holding thereof, is coupleable to the channel formed and is freely positionable at least within a region of the interior. According to the invention, in this case, the construction kit comprises at least one busbar designed for the supply of the light providing device and situated in the interior of the channel after the formation of the channel, or sections of such a busbar, wherein the busbar or the sections is or are in each case provided as a constituent of one of the components or as a component part secured or securable at one of the components. 
     Furthermore, a method for constructing a lighting arrangement according to the invention is proposed, wherein the method comprises the following steps:
         providing a channel having an interior and a light exit region, and providing at least one light providing device;   introducing the light providing device into the interior and coupling the light providing device to the channel in order to hold the light providing device within the interior; and   positioning the light providing device in such a way that the light providing device, if necessary after additional alignment thereof, can emit light during operation through the light exit region toward the outside.       

     One concept of the present invention consists in combining the arrangement of the light providing device within the interior of the channel and outward illumination or outward radiation using directional emission of light through the light exit region toward the outside with a free positionability of the light providing device within the interior, or at least within a region of the interior, and at the same time utilizing the great latitude afforded by the interior of the channel with regard to a flexible positioning of the light providing device not only in a transverse direction of the channel, but also along a longitudinal extent of the channel, by providing a busbar for supplying the light providing device in a simple and effective manner. Moreover, the length and shape of the channel can advantageously be adapted very flexibly to the lighting requirements and/or the spatial size. 
     The free positionability of the light providing device makes it possible to allow the light providing device to effect outward illumination through the light exit region precisely in the desired manner sought, for instance, for aesthetic reasons. This may also be advantageous if, within a spatial area, the arrangement of the objects to be illuminated changes for example after some time. By virtue of a busbar being provided, the light providing device can be positioned flexibly and freely even over long channel lengths. 
     The invention affords a highly flexible lighting possibility which additionally has advantageous glare reducing properties, as a result of the arrangement of the light providing device in the interior and the outward illumination through the light exit region. 
     Advantageous embodiments and developments are evident from the dependent claims and also from the description with reference to the figures of the drawing. 
     In accordance with one embodiment of the invention, the busbar is not visible from outside the interior. By way of example, a particularly simple and discreet appearance of the lighting arrangement can be achieved in this way. 
     In particular, in one development, the busbar can be arranged laterally with respect to the light exit region. This makes it easier to avoid a visibility of the busbar from outside. 
     In one embodiment, it is provided that for securing the light providing device at the channel at different locations within the interior the light providing device is coupleable to a constituent of the channel using magnetic force. The securing of the light providing device is thus achieved in a simple and reliable manner. 
     In particular, in one embodiment, the light providing device, for the coupling to the channel, can be securable in a magnetically adhering fashion at at least one inner surface region of the channel. In this way, a particularly simple, effective and flexible securing of the light providing device within the interior is accomplished in such a way that the light providing device can be positioned freely. 
     In one embodiment, the light providing device comprises at least one magnet, in particular a permanent magnet, by which the coupling of the light providing device to the channel is made possible. 
     In one embodiment, the light exit region is designed to be narrowed relative to the interior of the channel. This facilitates the reduction of glare and the “concealment” of the light providing device(s) in the channel. 
     In one embodiment, the light exit region is designed as a slotted opening and the light providing device arranged within the interior can emit light directionally toward the outside only through the light exit region. This contributes to advantageous glare reducing properties of the lighting device and to a discreet and simple lighting solution. 
     In one embodiment, the channel is designed with at least one integral or multipartite housing component having cover and wall sections and also having an open side. In this case, the light exit region transversely with respect to a longitudinal direction of the channel is designed to be smaller than the open side of the housing component. In this way, the light providing device or a plurality of light providing devices can be “concealed” particularly discreetly in the interior, a targeted, directional emission of light through the light exit region nevertheless being maintained. 
     In one development, the light providing device is coupleable to the housing component by magnetic force. In this case, the housing component may be formed with a material that enables such a coupling. 
     In one embodiment, the housing component can be designed with a quadrilateral, in particular rectangular, cross section, or with a quadrilateral, in particular rectangular, cross section having one or more rounded corners. Such a housing component enables the light providing devices to be accommodated in the interior in a simple manner. 
     In one embodiment, the wall and/or cover sections of the housing component, and in particular the inner surface regions of the housing component in the region of the wall and/or cover sections thereof, are substantially planar. Such a configuration facilitates the holding of the at least one light providing device by a magnetic force. 
     In particular, in one embodiment, the housing component can be designed as a sheet-metal part, for example composed of steel sheet, or with one or more sheet-metal parts, for example composed of steel sheet. 
     In one embodiment, the channel furthermore comprises profiled components coupled to the housing component in the region of the open side of the housing component, wherein the profiled components delimit the light exit region. By utilizing separately provided profiled components, it is possible to provide more complex geometries that are desired in the region of the delimitation of the light exit region, if appropriate, in a relatively simple manner. 
     In one development, the profiled components of the channel are configured to be arranged at a plate element in each case in sections on a side of the plate element that faces away from a visible side, in a manner engaging over an edge of the plate element. In this way, the channel can be hidden behind a suspended ceiling in a manner largely invisible from outside, wherein only the light exit region can be seen from the outer side, that is to say that side of the ceiling which faces a spatial area. A discreet and aesthetic lighting solution becomes possible as a result. The flexibility for the user with regard to the articles or spatial regions to be illuminated is fully maintained, however, even if the channel is permanently installed behind the ceiling and is covered by filler, for example, on the visible side, for instance laterally with respect to the light exit region. 
     The plate element is designed to be light-nontransmissive, in particular, and can be embodied for example as a plasterboard panel, for example for an intermediate ceiling or a wall covering. 
     In one embodiment, the profiled components are designed as metal profiles, wherein the profiled components are manufactured in particular from aluminum or an aluminum alloy material. The metal profiles can be extruded, for example, whereby even profiled components of complicated cross-sectional geometry are producible economically. 
     In one embodiment, the busbar is arranged in or at one of the profiled components or is formed in or at the profiled component in such a way that the busbar is accessible from the interior. In this way, accessibility for the supply of the light providing device is ensured, while at the same time the busbar can be hidden well in the interior, in such a manner that it cannot be seen from the visible side of the ceiling. 
     In particular, at least one of the profiled components or both profiled components can be designed in each case with a receptacle region for receiving the busbar. 
     In accordance with an embodiment of the invention, the busbar is designed as a two-phase busbar. In this configuration, the busbar is thus constructed relatively simply. 
     In one development, the busbar is configured for supplying the light providing device(s) with electric current at a voltage of 48 volts. 
     In particular, the busbar can run substantially parallel to the light exit region. In this way, a supply of current for the light providing device(s) can always be made possible reliably along the light exit region. 
     In one embodiment, the lighting arrangement comprises a line, in particular a cable, provided for supplying the light providing device, and also a connection adapter, which is electrically coupleable to the busbar. In this case, the line electrically couples the connection adapter to the light providing device. A flexible positioning of the light providing device relative to the connection adapter coupled to the busbar is possible in this way. The line may be designed to be pliable and flexible in this case. 
     In one advantageous development, provision can be made for arranging, on both longitudinal sides of the light exit region, in each case at least one busbar for the supply of the light providing device in the interior of the channel. Consequently, the length of the line which is to be arranged within the channel can be kept short, and the supply of current for the light providing device is accomplished even more simply and flexibly. 
     In one development, the connection adapter is equipped with one or more latching device(s), which enables or enable a latching coupling, which coupling may be re-releasable, of the connection adapter to one of the profiled components. Consequently, the connection adapter can be mechanically held in a simple manner at the profiled component equipped with the busbar. 
     In accordance with one embodiment of the invention, the line is designed in such a way that it can be magnetically coupled to a constituent of the channel and thereby be held and/or guided within the interior. This configuration, too, in combination with the busbar, in turn makes it possible to contribute to the flexible, free positionability of the light providing device, since, as a result of the magnetic coupling of the line to the channel and the line guidance obtained thereby, said line, depending on the positioning of the light providing device, can be arranged and held precisely where it results in the least disturbance. In particular, the line is prevented from hanging down into the light cone or light beam provided by the light providing device. This also considerably facilitates the arrangement of a plurality of light providing devices within the interior and the positioning thereof. 
     The line for the supply of the light providing device can be in particular a cable for supplying the light providing device with electric current. In the case of a plurality of light providing devices, each of them may have a dedicated supply line of this type. 
     In one embodiment, the line for the magnetic coupling to the constituent of the channel can be provided with a sheath containing one or more magnetic components, or the line can be provided with one or more magnetic holding elements along the longitudinal extent. 
     In accordance with an embodiment, the connection adapter or the light providing device comprises a device which makes it possible to wirelessly receive control signals for switching and/or controlling the light emission of the light providing device. By way of example, the device can be configured to receive and process further such control signals in accordance with the Zig Bee specification. 
     In one development, the lighting arrangement comprises a plurality of light providing devices, wherein each of the light providing devices is freely positionable at least within a region of the interior. In particular, the lighting arrangement can comprise for example two, three or four or even significantly more light providing devices. In this way, by way of example, a plurality of objects at different locations in a space can be illuminated simultaneously using the lighting arrangement. For this purpose, the plurality of light providing devices may be arranged within the interior in such a way that they can in each case emit light during operation through the light exit region toward the outside. The lighting of a plurality of articles or spatial regions is thus accomplished in a flexible and moreover discreet manner. However, it is likewise conceivable for exactly one light providing device to be arranged within the interior in the lighting arrangement, even though channels in particular of longer length are suitable for accommodating a multiplicity of light providing devices. 
     The plurality of light providing devices can be coupleable to the channel in particular in the same way. In a further embodiment, the plurality of light providing devices can be designed in particular in the same way in each case. 
     In a further embodiment, the lighting arrangement comprises differently designed light providing devices. In particular, in this case, each of the light providing devices is freely positionable at least within a region of the interior. Consequently, the diversity of lighting effects that can be achieved using the lighting arrangement can additionally be increased. 
     In particular, in one embodiment, it is conceivable to provide light providing devices that are designed differently, but are coupleable to the channel in the same way. 
     In accordance with one embodiment, the light providing device comprises a soft component, which makes contact with the channel when the light providing device is coupled to the channel. In particular, the soft component can be designed as a felt element. The soft component contributes to reduction of noise upon the coupling of the light providing device to the channel, and can also contribute to protecting the inner surfaces of the channel against superficial damage, for example as a result of scratching. Moreover, it also becomes possible to carry out positioning and variation of the positioning without damage and with low noise. 
     In one development, in addition to the free positionability of the light providing device the light providing device is furthermore alignable and/or adjustable as necessary for altering an emission direction of the light providing device. In this way, the flexibility with regard to the lighting of a wide variety of objects or the attainment of desired aesthetic lighting effects can be improved even further. For this purpose, the light providing device can comprise for example a pivotable functional section. 
     In one embodiment, the light providing device, for the directional emission of light, comprises a light source having a moderately narrow emission angle or, for example, a narrow emission angle. By way of example, the emission angle of the light source can be up to approximately 25 degrees inclusive, wherein the emission angle can be for example between approximately 6 degrees and approximately 25 degrees. In one variant, it would be conceivable for the light source to have an emission angle of a maximum of 15 degrees. The use of light sources with narrow emission, in particular, enables a targeted emission of light through the light exit region toward the outside in order to illuminate a spatial region or article there in a targeted manner. An undesired illumination of the channel interior by the light providing device is avoided. 
     In one embodiment, the light providing device comprises a cross-sectionally round functional section. In this case, provision is made, in particular, for a diameter of the functional section to be smaller than a width of the light exit region. Such a functional section is often maneuverable and space-saving. 
     In an alternative embodiment, the light providing device is formed with a linearly elongated shape or comprises a functional section formed with a linearly elongated shape. In this case, the linearly elongated shape can be designed in particular in a parallelepipedal fashion. In particular, moreover, a longitudinal extent of the linearly elongated shape can exceed a width of the light exit region. With this configuration of the invention, it is possible to accomplish for example the lighting of relatively large spatial or area regions or objects using one light providing device with at the same time good reduction of glare. 
     By way of example, in one advantageous development, the linearly elongated shape can extend parallel to the light exit region. 
     In one embodiment of the invention, the lighting arrangement comprises at least one additional light providing device which is designed for arrangement thereof at least in sections within the interior and is electrically coupleable to the busbar and is coupleable to the channel for the holding of the additional light providing device. In this case, the additional light providing device is formed with a linearly elongated shape or comprises a functional section formed with a linearly elongated shape. In this way, it is possible to achieve further, additional lighting effects, for example the lighting of relatively large area or spatial regions. 
     The linearly elongated shape of the additional light providing device can be parallelepipedal, in particular. 
     In particular, in one development, provision can be made for the additional light providing device to be arrangeable in the interior in such a way that it is flush with the plate elements on the visible side of the plate elements. With this development it becomes possible to provide further lighting effects in a flexible manner and advantageously to supplement the light effects made possible with the aid of the light providing device in the interior. 
     In developments of the invention, in a state coupled to the channel, the additional light providing device can substantially completely or only partly fill the light exit region in a direction transversely with respect to the longitudinal direction of the channel. 
     In a further embodiment, in a state coupled to the channel, the additional light providing device can project from the interior through the light exit region toward the outside in such a way that the additional light providing device emits light outside the interior. By way of example, the additional light providing device can be designed as a “wall washer” for irradiating a wall or can be equipped with an opalescent light emission region situated outside the interior in the state in which the additional light providing device is coupled to the channel. Consequently, with this configuration, too, in a flexible and diverse manner further lighting effects can be created and the light effects made possible by the light providing device in the interior can be supplemented in an advantageous manner. 
     In further embodiments, a plurality of additional light providing devices can be provided, wherein the latter can be designed identically or differently. 
     In one advantageous embodiment, the lighting arrangement furthermore comprises at least one additional light source which is arranged and designed to emit light into the interior and thereby to illuminate the channel. In this way, a particularly interesting aesthetic effect can be achieved in that not just the irradiation for instance of objects situated in the space through the light exit region is made possible, rather the interior also itself gives the impression of being luminous. With a light exit region of slotlike design, it is possible to achieve the impression of an indirectly luminous, slotted light exit hole (“glowing”). 
     In one embodiment, at least one of the profiled components or both profiled components is or are designed in each case with a receptacle region for receiving the additional light source. Consequently, the additional light source can be expediently accommodated. 
     In particular, in one development, the additional light source can be arranged in a manner facing the interior in a groove of the profiled component, as a result of which a body section of the profiled component is situated between the light exit region and the additional light source. Consequently, the additional light source cannot be seen from the visible side, which additionally improves the aesthetic effect of backlighting or of “glowing”. 
     In one embodiment, the additional light source can be formed with at least one LED or an LED arrangement. The channel can thereby be illuminated in a space-saving and energy-efficient manner. 
     Furthermore, in one development, the additional light source can comprise a light-transmissive covering, in particular an opalescent covering. The opalescent covering can be formed for example with a plastics material, for example PMMA. This can contribute to an even more uniform illumination of the channel. 
     In one embodiment, an additional light source is arranged in each case on both longitudinal sides of the light exit region. By way of example, an even more homogeneous indirect backlighting of the channel can be made possible in this way. 
     In one embodiment, the lighting arrangement is formed with two or more units along the longitudinal direction of the channel, wherein respectively adjacent units are coupled using one connecting component or a plurality of connecting components. The units here comprise in particular in each case a channel section with sections of the profiled components and the housing component, and also at least one busbar section, and may for example comprise at least one additional light source or a section thereof. 
     In one embodiment, the units extend rectilinearly in each case and respectively adjacent units are coupled to one another rectilinearly or angularly by the connecting component or the connecting components. 
     By way of example, in embodiments of the invention, the units can be coupled to one another in a manner angled relative to one another by substantially 90 degrees, wherein other angles are conceivable in other embodiments. 
     In one embodiment, two or more units extend rectilinearly in each case and, furthermore, a further unit designed as a corner piece is provided and the rectilinear units are coupled to the unit designed as a corner piece in each case using the connecting component or connecting components. Consequently, in this configuration, the rectilinear units can be coupled to one another in an angular manner via the corner piece. In this embodiment, the unit designed as a corner piece comprises in particular a channel corner section. Corner pieces for a coupling of rectilinear units at an angle of substantially 90 degrees or in a manner angled by other angles are conceivable. 
     In particular, provision can be made of at least one connecting component for electrically coupling busbar sections of adjacent units, wherein the connecting component is equipped with latching devices that enable a latching coupling, which coupling may be re-releasable, of the connecting component to two sections of a profiled component which meet at a connecting location between adjacent units. Consequently, the connecting component can also be held in a simple manner at the profiled components equipped with the busbar sections to be coupled. 
     In a further embodiment, the channel is closed at end faces in each case by an end terminating piece. Consequently, light cannot emerge in an undesired manner at end faces of the channel. 
     In a further embodiment, the lighting arrangement comprises a feed-in line designed for feeding electric current into the busbar, in particular a cable, and also a feed-in component that is electrically coupleable to the busbar. In this case, the feed-in line electrically couples the feed-in component to a current source outside the interior. In this way, current can be fed into the busbar in a flexible manner. In particular, the feed-in line can advantageously be led through a passage opening in the end terminating piece. 
     In one development, the feed-in component is equipped with one or a plurality of latching device(s) which enables or enable a latching coupling, which coupling may be re-releasable, of the feed-in component to one of the profiled components. Consequently, the feed-in component can also be mechanically held in a simple manner at the profiled component equipped with the busbar. 
     In one embodiment, the channel is provided with at least one holding device, and may be provided with a plurality of holding devices, which is/are configured for securing the channel at a load-bearing constituent of a building structure, in particular at a bare ceiling or solid ceiling. In this case, in particular, further additional securing elements can furthermore be used if necessary, for example screws, rods, tapes, hooks, chains and/or ropes, in order to secure the channel at the load-bearing constituent of the building structure using the holding device(s). The securing can be effected in particular in a suspended manner. This configuration advantageously makes it possible to hold the channel&#39;s own weight and the weight of components of the lighting arrangement that are coupled to the channel wholly or at least partly at the load-bearing constituent of the building structure, in particular a load-bearing ceiling. In this way, it is possible for example to relieve the burden on plate elements of an intermediate ceiling. 
     In one development, the holding device(s) is/are designed in each case as an angular piece secured at the channel. 
     In one embodiment of the method, the light providing device is coupled to a constituent of the channel by magnetic force. The advantages of the coupling by magnetic force have already been mentioned above. 
     In one embodiment, the method furthermore comprises adjusting the light providing device by sliding displacement and/or rotation of the light providing device at the channel. As a result, the adjusting can be carried out in a particularly simple and flexible manner. 
     In one development of the method, the introduction of the light providing device into the interior, the coupling of said light providing device to the channel, and the positioning of the light providing device are carried out through a slotted opening that forms or comprises the light exit region, in particular after the channel has been mounted in the region of a ceiling and/or wall. This is advantageous since, during the installation of the channel, it is not yet necessary to stipulate how many light providing devices are intended to be received in the interior and how they are intended to be aligned. A highly flexible construction of the lighting arrangement becomes possible in this way. 
     In one embodiment, the method furthermore comprises coupling a connection adapter to the busbar in the interior of the channel, arranging a line provided for supplying the light providing device, which line electrically couples the connection adapter to the light providing device, within the interior and magnetically coupling the line to a constituent of the channel in order to hold the line within the channel. The advantages of such a magnetic coupling have likewise already been mentioned above. 
     In a further embodiment of the method, at least one additional light providing device is provided, which is designed for arrangement thereof at least in sections within the interior and is electrically coupleable to the busbar and is coupleable to the channel for the holding of the additional light providing device, wherein the additional light providing device is formed with a linearly elongated shape or comprises a functional section formed with a linearly elongated shape. The additional light providing device is introduced at least in sections into the interior and coupled to the channel in order to hold the additional light providing device. 
     In a further embodiment, the method can furthermore comprise adjusting the additional light providing device by sliding displacement and/or rotation of the additional light providing device at the channel. 
     In one development of the method, the introduction of the additional light providing device into the interior, the coupling of said additional light providing device to the channel, and a positioning of the additional light providing device are carried out through a slotted opening that forms or comprises the light exit region, in particular after the channel has been mounted in the region of a ceiling and/or wall. This in turn enables a very flexible construction of the lighting arrangement. 
     In one embodiment of the construction kit, the components for forming the channel comprise channel sections, or the components for forming the channel comprise the housing component and also the profiled components, or the components for forming the channel comprise sections of the housing component and also sections of the profiled components for forming channel sections. Moreover, in developments, the construction kit can comprise the connecting components required for the channel shape to be created and/or the holding devices for the channel. 
     In one embodiment of the construction kit, the construction kit furthermore comprises the at least one additional light source or sections of such an additional light source, wherein the additional light source or the sections thereof is or are provided in each case as a constituent of one of the components or as a component part secured or securable at one of the components. 
     In one development of the construction kit, the busbar or the sections thereof is or are secured or securable in each case at at least one of the profiled components or the sections thereof. 
     In a further development of the construction kit, the additional light source or the sections thereof is or are secured or securable in each case at at least one of the profiled components or the sections thereof. 
     In one embodiment of the construction kit, the latter can comprise the units for forming the lighting arrangement, wherein the units in each case comprise a section or sections of the housing component, of the profiled components, of the busbar(s) and, if desired, of the additional light source(s) and the units are preassembled. The units can comprise rectilinear units and in particular furthermore at least one unit designed as a corner piece. 
     Furthermore, in further embodiments, the construction kit can comprise a line and a connection adapter for each of the light providing devices. 
     Furthermore, in yet another embodiment, the construction kit can comprise at least one feed-in line and at least one feed-in component for the busbar. 
     In yet another development, the construction kit can contain at least one end terminating piece. 
     Furthermore, in a further embodiment, the construction kit can comprise at least one additional light providing device, which is designed for arrangement thereof at least in sections within the interior and is coupleable to the channel for the holding of the additional light providing device, wherein the additional light providing device is formed with a linearly elongated shape or comprises a functional section formed with a linearly elongated shape. 
     It should be mentioned that, in developments of the invention, the above-described embodiments concerning the coupling of the light providing device to the channel, in particular to the housing component, concerning the electrical supply of the light providing device, in particular via the line and the connection adapter provided in accordance with the embodiments explained above, and also concerning the control and/or switching of the light providing device can analogously be applied to the additional light providing device(s). The corresponding configurations of the method can also be analogously applied to the additional light providing device(s). 
     It should be pointed out that the abovementioned embodiments and developments of the invention can be applied to the lighting arrangement and also to the construction kit and the method according to the invention. 
     The above embodiments and developments can be combined with one another in any desired manner, provided that this is expedient. Further possible configurations, developments and implementations of the invention also encompass not explicitly mentioned combinations of features of the invention described above or below with regard to the exemplary embodiments. In particular, here the person skilled in the art will also add individual aspects as improvements or supplementations to the respective basic form of the present invention. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The invention is explained in greater detail below on the basis of the exemplary embodiments indicated in the figures of the drawings, in which: 
         FIG. 1  shows a lighting arrangement in accordance with a first exemplary embodiment of the invention, in a cross-sectional view, comprising two light providing devices of identical type; 
         FIG. 2  shows one rectilinear section of the lighting arrangement from  FIG. 1 , as seen from a visible side of an intermediate ceiling; 
         FIG. 3  shows another rectilinear section of the lighting arrangement from  FIG. 1  in the region of a connecting location between two units, as seen from a rear side of the intermediate ceiling opposite to the visible side thereof; 
         FIG. 4  shows a section of the lighting arrangement from  FIG. 1  in the region of an end face of a channel, as seen in sections from an opposite side of the intermediate ceiling relative to the visible side thereof; 
         FIG. 5  shows an angled section of the lighting arrangement from  FIG. 1 , as seen from the visible side of the intermediate ceiling; 
         FIG. 6  shows the angled section of the lighting arrangement from  FIG. 1  as illustrated in  FIG. 5 , as seen from an opposite side of the intermediate ceiling relative to the visible side thereof; 
         FIG. 7  shows a perspective illustration of a light providing device; 
         FIG. 8  shows a central section through the light providing device from  FIG. 7 ; 
         FIG. 9  shows a perspective sectional illustration of the light providing device from  FIG. 7 ; 
         FIG. 10  shows a side view of the light providing device from  FIG. 7  with a functional section in a state pivoted by 90 degrees; 
         FIG. 11  shows a sectional illustration of the light providing device from  FIG. 7  in the state in  FIG. 10 ; 
         FIG. 12  shows a perspective view of the light providing device from  FIG. 7  as seen from the side of a glare reducing ring; 
         FIG. 13  shows a perspective view of the light providing device from  FIG. 7  in the state in  FIG. 10 , from the side of the glare reducing ring; 
         FIG. 14  shows an exploded view of the light providing device from  FIG. 7 ; 
         FIG. 15  shows an enlarged view of a base section of the light providing device from  FIG. 7 ; 
         FIG. 16  shows a line which is magnetically coupleable to a constituent of the channel, said line being embodied as a cable; 
         FIG. 17  shows a line which is magnetically coupleable to a constituent of the channel, said line being embodied as a cable, in accordance with one variant; 
         FIG. 18  shows a line which is magnetically coupleable to a constituent of the channel, said line being embodied as a cable, in accordance with yet another variant; 
         FIG. 19  shows a lighting arrangement in accordance with a second exemplary embodiment of the invention, as seen in a perspective view from the end of one unit and from an opposite side of the intermediate ceiling relative to a visible side thereof, with two different light providing devices; 
         FIG. 20  shows the lighting arrangement from  FIG. 19  in a cross-sectional view; 
         FIG. 20A  shows an enlarged portion from  FIG. 20  in the region of a profiled component; 
         FIG. 21  shows the lighting arrangement from  FIG. 19  in a cross-sectional view, wherein additional light sources for indirect backlighting are not illustrated; 
         FIG. 22  shows the lighting arrangement from  FIG. 19  as seen in a perspective view from the end of one unit and the opposite side of the intermediate ceiling relative to the visible side thereof, wherein additional light sources for indirect backlighting are not illustrated; 
         FIG. 23  shows an enlarged excerpt from  FIG. 22 ; 
         FIG. 24  shows a connecting component for mechanically connecting adjacent units, inserted into a profiled component, in the lighting arrangement in accordance with the second exemplary embodiment, as seen in perspective view from the opposite side of the intermediate ceiling relative to the visible side thereof; 
         FIG. 25A  shows the connecting component from  FIG. 24  in a plan view; 
         FIG. 25B  shows the connecting component from  FIG. 24  in an end-side view; 
         FIG. 25C  shows the connecting component from  FIG. 24  in a perspective view from above; 
         FIG. 26  shows a perspective sectional illustration of a light providing device in accordance with one variant; 
         FIG. 27  shows a sectional illustration of the light providing device from  FIG. 26  with a functional section in a state pivoted by 90 degrees; 
         FIG. 28  shows a perspective view of the light providing device from  FIG. 26 ; 
         FIG. 29  shows a perspective view of the light providing device from  FIG. 26  with a functional section in the state pivoted by 90 degrees, as seen from the side of a glare reducing ring; 
         FIG. 30A  shows a connection adapter of the lighting arrangement in accordance with the second exemplary embodiment, in a plan view; 
         FIG. 30B  shows the connection adapter from  FIG. 30A  in an end-side view; 
         FIG. 30C  shows the connection adapter from  FIG. 30A  in a longitudinal-side view; 
         FIG. 30D  shows the connection adapter from  FIG. 30A  in a bottom view; 
         FIG. 30E  shows the connection adapter from  FIG. 30A  in a perspective view from below; 
         FIG. 30F  shows the connection adapter from  FIG. 30A  in a perspective view from above; 
         FIG. 30G  shows the connection adapter from  FIG. 30A  in a further view perspectively from above; 
         FIG. 31  shows the connection adapter from  FIG. 30A  in a perspective view from above as in  FIG. 30F , with a line for coupling the connection adapter to a light providing device; 
         FIG. 32A  shows a connecting component for electrically coupling busbar sections, for the lighting arrangement in accordance with the second exemplary embodiment, as seen in a perspective view from below; 
         FIG. 32B  shows the connecting component from  FIG. 32A  in a plan view; 
         FIG. 32C  shows the connecting component from  FIG. 32A  in an end-side view; 
         FIG. 32D  shows the connecting component from  FIG. 32A  in a longitudinal-side view; 
         FIG. 32E  shows the connecting component from  FIG. 32A  in a bottom view; 
         FIG. 32F  shows the connecting component from  FIG. 32A  in a perspective view from above; 
         FIG. 33  shows an assembly that forms an additional light source for indirect backlighting, for the lighting arrangement in accordance with the first or second exemplary embodiment; 
         FIG. 34  shows the assembly from  FIG. 33  in an enlarged view in the region of one end thereof; 
         FIG. 35  shows a cross-sectional view of the assembly from  FIG. 33 ; 
         FIG. 36  shows a perspective view of an end face of a channel of the lighting arrangement in accordance with the second exemplary embodiment, wherein the end face is closed by an end terminating piece and feed-in lines are visible; 
         FIG. 37A  shows a feed-in component of the lighting arrangement in accordance with the second exemplary embodiment, in a plan view; 
         FIG. 37B  shows the feed-in component from  FIG. 37A  in an end-side view; 
         FIG. 37C  shows the feed-in component from  FIG. 37A  in a longitudinal-side view; 
         FIG. 37D  shows the feed-in component from  FIG. 37A  in a bottom view; 
         FIG. 37E  shows the feed-in component from  FIG. 37A  in a perspective view from above; 
         FIG. 37F  shows the feed-in component from  FIG. 37A  in a further view perspectively from above; 
         FIG. 37G  shows the feed-in component from  FIG. 37A  in a perspective view from below; 
         FIG. 38  shows the feed-in component from  FIG. 37A  in a perspective view from above as in  FIG. 37E , with a feed-in line for coupling the feed-in component to a current source outside the channel; 
         FIG. 39A  shows a cross-sectional view of a lighting arrangement for elucidating a modification of the second exemplary embodiment; 
         FIG. 39B  shows a rectilinear section of a lighting arrangement in accordance with the modification from  FIG. 39A , as seen from a visible side of an intermediate ceiling; 
         FIG. 40A  shows a cross-sectional view of a lighting arrangement for elucidating a further modification of the second exemplary embodiment; 
         FIG. 40B  shows a rectilinear section of a lighting arrangement in accordance with the modification from  FIG. 40A , as seen from a visible side of an intermediate ceiling; 
         FIG. 41A  shows a cross-sectional view of a lighting arrangement for elucidating yet another modification of the second exemplary embodiment; 
         FIG. 41B  shows a rectilinear section of a lighting arrangement in accordance with the modification from  FIG. 41A , as seen from a visible side of an intermediate ceiling; 
         FIG. 42A  shows a cross-sectional view of a lighting arrangement for elucidating yet another modification of the second exemplary embodiment; 
         FIG. 42B  shows a rectilinear section of a lighting arrangement in accordance with the modification from  FIG. 42A , as seen from a visible side of an intermediate ceiling; 
         FIG. 43  shows two steps in an exemplary mounting process for a lighting arrangement in accordance with the second exemplary embodiment in schematic sectional illustration; 
         FIG. 44  shows an angled section of the lighting arrangement from  FIG. 19 , as seen from an opposite side of the intermediate ceiling relative to the visible side thereof; 
         FIG. 45  shows a lighting arrangement in accordance with one variant of the second exemplary embodiment, as seen in a perspective view from the end of one unit and from an opposite side of an intermediate ceiling relative to a visible side of the intermediate ceiling; and 
         FIG. 46  shows the unit of the lighting arrangement as illustrated in  FIG. 45 , in an end-side view. 
     
    
    
     The accompanying figures are intended to convey a further understanding of the embodiments of the invention. They illustrate embodiments and in association with the description they serve to clarify principles and concepts of the invention. Other embodiments and many of the advantages mentioned are evident in view of the drawings. The elements of the drawings are not necessarily shown in a manner true to scale with respect to one another. 
     In the figures of the drawing, identical, functionally identical and identically acting elements, features and components—unless explained otherwise—are provided in each case with the same reference signs. 
     DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS 
       FIG. 1  shows a lighting arrangement  1  in accordance with a first exemplary embodiment of the invention. The lighting arrangement  1  comprises a channel  3 , which is illustrated in cross section in  FIG. 1  and which is formed with a housing component  4 , constructed from a plurality of parts, and two profiled components  6 . The housing component  4  comprises wall sections  4   a  and  4   b  parallel to one another, and a cover section  4   e . As a result, the housing component  4  is substantially closed at three sides, specifically by the wall sections  4   a ,  4   b  at the opposite longitudinal sides, which are aligned vertically in  FIG. 1 , and also by the cover section  4   e  at the top side, which is aligned horizontally in  FIG. 1 . In the region of the underside, the bottom side of the housing component  4  in  FIG. 1 , said underside being situated opposite the top side, the housing component  4  is open, that is to say has an open side  4   f . The underside of the housing component  4  is terminated by the profiled components  6 , which are arranged in the region of the open side  4   f  and are coupled to the housing component  4 . For this purpose, the profiled components  6  and the housing part  4  can be secured to one another in connecting regions  6   a  in a suitable manner. 
     The housing component  4  is designed with a plurality of sheet-metal parts for forming the wall and cover sections  4   a ,  4   b ,  4   e , for example composed of steel sheet. By contrast, the profiled components  6  are manufactured as elongated profiles composed of a metal material, in particular aluminum or an aluminum alloy material, e.g. by extrusion. 
     The channel  3  is provided for being arranged and secured behind an appropriately dimensioned slot  10   a  having a width W in a suspended intermediate ceiling  10 , in particular a plaster ceiling, between the bare ceiling R and the suspended ceiling  10 . The slot  10   a  can be cut into a plate element  9  of the ceiling  10  and, see  FIG. 1 , be delimited by edges  9   a  of the plate element  9 . Alternatively, the slot  10   a  could be formed by plate elements  9  spaced apart from one another by the width W of the slot  10   a  and be delimited by respectively an edge  9   a  of one of the plate elements  9 . The thickness t of the plate elements  9  can be 12.5 mm, for example, wherein modifications of the exemplary embodiment can be adapted to other plate thicknesses t. 
     In order to fix the channel  3  to the ceiling  10 , the lighting arrangement  1  can comprise in particular suitable holding means, not illustrated in  FIG. 1 , which enable for example a securing of the channel  3  at intervals along the longitudinal direction  3   a  thereof.  FIG. 1  also shows a visible side S of the intermediate ceiling  10  and a side S′ of the intermediate ceiling  10 , and thus of the plate elements  9 , which faces away from the visible side S. 
     The profiled components  6  are configured, see  FIG. 1 , to be arranged in each case in sections on the side S′ on the plate elements  9  and for this purpose to be placed onto the plate elements  9  from the side S′, wherein in the finished state, see  FIG. 1 , each of the profiled components  6  engages over the edge  9   a  of the plate element  9  on which the profiled component  6  bears. After the installation of the channel  3  behind the ceiling  10 , application of filler can be carried out on the visible side S for instance in the context of dry construction work. 
       FIG. 1  furthermore shows that the two profiled components  6 , which are designed and arranged symmetrically with respect to a center axis M of the channel  3 , do not touch one another at their facing edges, rather a slotted opening  28  is provided between the profiled components  6 , said slotted opening forming a passage from the visible side S to an interior  5  of the channel  3 . The opening  28  serves as a light exit region  31  of the channel  3 . With the exception of the opening  28 , the open side  4   f  of the housing component  4  is closed. In a direction transversely with respect to the longitudinal direction  3   a  (see e.g.  FIG. 2 ) of the channel  3 , the light exit region  31  is smaller than the open side  4   f  of the housing component  4 . To put it another way, the light exit region  31  is narrowed in comparison with the interior  5  of the channel  3 . In  FIG. 1 , the width of the light exit region  31 , taken perpendicularly to the longitudinal direction  3   a  of the channel  3 , is designated by the reference sign B. The profiled components  6  thus delimit the light exit region  31 . 
     The lighting arrangement  1  in accordance with the first exemplary embodiment furthermore comprises two light providing devices  36  of identical type, which are shown in  FIG. 1 . The light providing devices  36  are dimensioned and designed in each case in a suitable manner in order to be arranged within the interior  5  of the channel  3 . In the illustration in  FIG. 1 , both light providing devices  36  are arranged in the interior  5 . The two light providing devices  36  here are situated in each case completely within the interior  5 . In the first exemplary embodiment, the light providing devices  36  are designed as emitters with narrow emission or “spots”. The light providing devices  36  will be explained in even greater detail below with reference to  FIGS. 7-15 . 
     The light providing devices  36  are provided in each case to emit light L during operation through the light exit region  31  directionally toward the outside, that is to say to be luminous from the interior  5  in a targeted manner through the light exit region  31 . Since the plate elements  9 , the profiled components  6  and the housing component  4  are light-nontransmissive in the first exemplary embodiment, the light providing devices  36  can radiate light directionally toward the outside only through the light exit region  31 . What is accomplished in this way is that an object, or a spatial region, situated outside the interior  5  within the spatial area having the suspended ceiling  10  is illuminated in a targeted manner through the light exit region  31  and at the same time a particularly expedient glare reducing behavior is attained. The light providing devices  36  are virtually imperceptible to an observer situated in the illuminated spatial area, but nevertheless enable a targeted illumination of selected spatial regions, architectural features or articles situated in the spatial area. This is accomplished by virtue of the fact that the light providing devices  36 , as seen from outside the interior  5 , are arranged and thus “concealed” behind the profiled components  6  and the edge sections of the plate elements  9 , on which the profiled components  6  bear, in the interior  5 , that is to say that the light providing devices  36  are situated in a manner set back behind the ceiling  10  relative to a plane  11  forming an outer side of the ceiling  10 . 
     A light providing device  36  such as is used in the first exemplary embodiment in  FIG. 1  is illustrated in greater detail in  FIGS. 7-15 . The light providing device  36  comprises a cross-sectionally round functional section  45  having a substantially cylindrical basic shape and also a base section  46 , wherein the base section  46  is connected to the functional section  45  via a rod  47 . Via a pivoting axis  48 , the functional section  45  can be pivoted relative to the base section  46 , for example by 90 degrees. A diameter D of the functional section  45  is smaller than the width B of the light exit region  31 , see  FIGS. 1 and 10 . 
     The light providing device  36  is designed as an emitter or “spot” and comprises a light source having a narrow emission angle α (see  FIG. 1 ). In the first exemplary embodiment, the emission angle α is a maximum of 25 degrees. The emission angle α can be for example between 6 degrees and 25 degrees. By virtue of the fact that the light providing device  36  comprises a light source with narrow emission, despite the light providing device  36  being set back behind the plane  11  into the interior  5 , an object outside the interior  5  can be illuminated in a targeted manner through the light exit region  31 , without excessive losses occurring as a result of the illumination of the interior  5 . 
     Each of the light providing devices  36  is coupleable to the channel  3  via the base section  46  in order to hold the light providing device  36  at the channel  3 . For this purpose, the base section  46  comprises a permanent magnet  55 , which is designed as a ring magnet in the exemplary embodiment shown. As described above, the housing component  4  is designed with sheet-metal parts, wherein in the first exemplary embodiment for the housing component  4  a metal sheet is chosen on which a permanent magnet can exert an attractive force. By way of example, the housing component  4  is formed with steel sheet. In the case of the cross-sectionally rectangular design of the housing component  4  having planar wall and cover sections  4   a ,  4   b ,  4   e , wall regions  5   a  and  5   b  and also an inner cover region  5   e  of the inner surface of the housing component  4  are embodied in a planar fashion. 
     Using the permanent magnet  55  arranged in the base section  46 , each of the light providing devices  36  can be coupled to the housing component  4  of the channel  3  by magnetic force. For this purpose, the respective light providing device  36  is secured by its base section  46  in a manner adhering magnetically at one of the inner surface regions  5   a - 5   e . The magnet  55  can thus hold the light providing device  36  in a magnetically adhering manner both at one of the walls of the housing component  4  in the wall regions  5   a ,  5   b  and at the cover of the housing component  4  in the cover region  5   e . This is facilitated by the planar configuration of the wall and cover regions  5   a ,  5   b ,  5   e , which enable simple bearing of the base section  46 . Each of the light providing devices  36  is thus freely positionable within the interior  5  in such a way that the respective base section  46  can be coupled in a manner adhering magnetically at an arbitrary free location of the inner surface regions  5   a ,  5   b ,  5   e , as necessary (see  FIG. 1 ). A free positionability of the light providing devices  36  is thus achieved in the longitudinal direction  3   a  of the channel  3 ; moreover, however, a free positionability is also attained in the interior  5  transversely with respect to the longitudinal direction  3   a . This is accomplished with the aid of the magnetic coupling to the inner surface regions  5   a ,  5   b ,  5   e , of which the inner surface region  5   e , in the exemplary embodiment depicted schematically, extends substantially parallel to the plate elements  9  and the inner surface regions  5   a ,  5   b  extend substantially perpendicularly to the plate elements  9 . It goes without saying that collisions between two light providing devices  36  can be avoided by suitable arrangement thereof in the interior  5 . 
     The light providing devices  36  can thus be positioned freely at the channel  3  within the interior  5 , or at least one region thereof. In  FIG. 1 , one of the light providing devices  36  is coupled to the housing component  4  by way of example in the cover region  5   e , while the other light providing device is coupled to the channel  3  in the wall region  5   b.    
     On account of the securing using the magnetic coupling to the housing component  4 , the light providing devices  36  can be slidingly displaced and rotated at the housing component  4 , without the position of a light providing device  36  within the interior  5  being restricted to one or more discrete positions. Rather, the positions of the light providing devices  36  are continuously variable. Consequently, a diversity of different arrangements of a plurality of light providing devices  36  becomes possible. 
     An edge of each of the profiled components  6  forms a boundary  33  for the light exit region  31  along a respective longitudinal side  32  thereof. Adjacent to the boundary  33  of the light exit region  31 , each of the profiled components  6  is designed in a beveled fashion, as a result of which, in the completed lighting arrangement  1 , see  FIG. 1 , a region  29  is formed which widens proceeding from the opening  28 , and thus proceeding from the visible side S, inward, that is to say toward the interior  5 . In the first exemplary embodiment, the boundaries  33  run parallel to one another, as a result of which the region  29  widens inward in the same way at every point as seen over the length of the channel  3 . This prevents the emission of light by the light providing devices  36  from being impeded by the profiled components  6  if the light providing devices  36  are positioned relative to the opening  28  in a laterally offset manner behind partial regions of the profiled components  6 , for instance in the vicinity of one of the wall sections  4   a  or  4   b.    
     In  FIG. 1 , the functional section  45  and also the base section  46  and the rod  47  are situated completely within the interior  5 . The light providing devices  36  in  FIG. 1  are freely positionable in each case as a whole within the interior  5 , and magnetically securable at a chosen location within the interior  5 , and the light providing device  36  is moreover alignable within the interior  5 , for example by the pivoting of the functional section  45  about the pivoting axis  48 . By pivoting of the functional section  45 , a light providing device  36  coupled to the cover section  4   e  can be luminous out of the light exit region  31  for example at an inclination with respect to a vertical direction V. By way of example, a pivoting of the functional section  45  is illustrated in  FIG. 1  for the light providing device  36  magnetically coupled to the wall section  4   b . A further alignment can be effected by rotation about a surface-normal axis  49  by the sliding of the base section  46  on the cover region  5   e  of the inner surface or about a surface-normal axis  49 ′ by sliding on the wall region  5   b . By such adjustment of the functional section  45 , the emission direction A of the light providing device  36  can thus be altered flexibly as required, in addition to the free positionability of the light providing device  36 . 
     The light providing devices  36  in  FIG. 1  are thus freely and arbitrarily positionable within the interior  5  of the channel  3 , rotatable about the axis  49  or  49 ′ and pivotable about the axis  48 , such that light L can be emitted directionally through the opening  28  toward the outside. 
     The base section  46  is, see  FIGS. 7 to 15 , of substantially cylindrical outer basic shape, wherein the base section  46  comprises a soft component  64  on a planar end side facing away from the functional section  45 , wherein said soft component may be designed as a circular felt disk in the exemplary embodiment in  FIGS. 7-15 . Upon the coupling of the light providing device  36  to the channel  3  using the permanent magnet  35 , the soft component  64  makes contact with the cover region  5   e  or one of the wall regions  5   a ,  5   b  of the inner surface of the housing component  4 . Noises when the light providing device  36  is inserted into the interior  5  and when said light providing device is coupled to the channel  3 , and also noises and damage at the inner surface regions  5   a ,  5   b ,  5   e  of the housing component  4  during the displacement or rotation of the base section  46  in the state magnetically coupled to the housing component  4  can be avoided by the soft component  64 . 
     The view in  FIG. 14  shows individual parts of a light providing device  36  from  FIGS. 7-13 and 15 . The base section  46  is formed with a round base housing component  67 , which receives the permanent magnet  55  embodied as a ring magnet. The ring magnet  55  is clamped in the base housing component  67  in  FIG. 14  from above by a part  66  that is disklike in sections and is provided with perforations or holes  66   a , wherein the part  66 , the magnet  55 , the base housing component  67  and the rod  47  are held together by screws  68 . The part  66  can moreover snap in place at the base housing part  67 . The soft felt element  64 , which enables easy, damage-free and low-noise sliding, is adhesively bonded at its underside  65  to the disklike section of the perforated part  66 . The part  66  can be manufactured from plastic, for example, and the base housing part  67 , the rod  47  and the shell parts  70  can be manufactured for example from metal, for instance aluminum. The perforations or holes  66   a  improve the attained magnetic holding effect of the magnet  55 . 
     The functional section  45  is formed with a heat sink  72 , an LED module  73  for generating light, an optical unit  74  comprising, for instance, a lens and/or a reflector, a film  75  for the purpose of optical enhancement, and furthermore a glare reducing ring  76 . In order to connect the functional section  45  to the base section  46  using the rod  47 , the shell parts  70  are held with frictional engagement in a cutout of the heat sink  72 , wherein the shell parts  70  are connected to the rod  47  using a screw  69  and washers  71 . Moreover, the pivoting axis  48  is realized by the screw  69 . The narrow emission angle α of the light providing device  36 , as already mentioned, is made possible with the aid of the optical unit  74 . 
     The number of light providing devices  36  arranged within the interior  5  can vary for example depending on the lighting requirement and/or depending on the installed length of the channel  3 . A varying number of light providing devices  36  can be arranged within the interior  5 . In the case of a channel  3  extending transversely through a space in the cover region and thus in the case of an elongated slotlike light exit region  31 , a multiplicity of light providing devices  36  can be accommodated in the interior  5  in such a way that they can emit light L directionally toward the outside. 
     Moreover, electrical lines  85 , in particular cables, which serve in each case to supply current to one of the light providing devices  36 , are depicted schematically in  FIG. 1 . Each of the lines  85  is situated within the interior  5 . 
     The lighting arrangement  1  in  FIG. 1  furthermore comprises, in the interior  5  of the channel  3 , a busbar  95  designed for the supply of the light providing devices  36 , to which busbar each of the light providing devices  36  can be electrically coupled separately by themselves and at a position chosen individually in each case according to the positioning of the light providing device  36 . 
     The busbar  95  is arranged at one of the profiled components  6  in such a way that the busbar  95  is accessible from the interior  5  in order to be able to supply the light providing device  36  with current. It is also evident from  FIG. 1  that the busbar  95  is arranged laterally with respect to the slotlike opening  28 , and thus laterally with respect to the light exit region  31 . In this way, with the aid of the arrangement of the busbar  95  and the shaping of the profiled component  6 , what is achieved is that the busbar  95  cannot be seen by an observer from the visible side S. This is particularly advantageous from an aesthetic standpoint and enables a simple, discreet appearance of the lighting arrangement  1 . 
     The busbar  95  may be designed in a two-phase fashion, is configured to supply the light providing devices  36  with electric current at a DC voltage of 48 volts, and is received in a suitable groovelike receptacle region  96  formed at the profiled component  6 . In this case, the busbar  95  runs parallel to the light exit region  31  and to the boundaries  33  thereof. The busbar  95  can be connected to an electrical grid for example via a transformer, not shown in the figures. 
     Each of the two light providing devices  36  in  FIG. 1  is electrically connected, via an assigned one of the electrical lines  85 , to a connection adapter  99  respectively assigned to the light providing device  36 . This is depicted schematically only for one of the light providing devices  36  in  FIG. 1 . In this case, the connection adapter  99  serves as a tapping device, which is electrically coupleable to the busbar  95 , in order to tap off electric current from the busbar  95 . 
     In order to be able to supply each of the light providing devices  36  with electric current, a line  85  is provided for each of the light providing devices  36 . The supply line  85  is designed in each case in such a way that it can be coupled magnetically to the channel  3 , namely to the ferromagnetic housing component  4 , whereby the line  85  is guided and held at the inner side of the housing component  4  on its way from the connection adapter  99  to the light providing device  36 , a sagging of the supply line  85  is avoided, and, as a result, the supply line  85  is also prevented from hanging down undesirably into the light beam or cone respectively generated by the light providing devices  36 .  FIG. 1  shows how, by way of example, a supply line  85  is magnetically guided along the inner surface regions  5   b ,  5   e . It goes without saying that supply lines  85  for further light providing devices  36  can be arranged in a similar manner. 
       FIGS. 16, 17 and 18  show different variants as to how the supply line  85  can be magnetically coupled to the housing component  4 , on the basis of exemplary sections of lines  85 ′,  85 ″,  85 ″. The supply line  85 ′ in  FIG. 16  comprises conductors  86 , a sheath  87  and also ringlike holding elements  88  surrounding the sheath  87  on the outer side thereof and secured at the sheath  87 , said holding elements for their part being magnetic or a permanent magnet being embedded in each case into said holding elements. In the case of the supply line  85 ″ in  FIG. 17 , clips  89  having a ringlike holding section  89   a  and a magnetic adhesion section  89   b  are formed instead of the ringlike holding elements. The adhesion section  89   b  can be a permanent magnet or a permanent magnet can be embedded into the adhesion section  89   b . In the case of the variant in  FIG. 18 , the supply line  85 ″ is provided with a sheath  87 ″, wherein magnetic components, in the form of small individual magnets, magnetized tapes or magnetic fabrics, can be embedded into the sheath  87 ″. Only a section of a magnetized tape  90  is illustrated by way of example in  FIG. 18 . 
     The lighting arrangement  1  in  FIG. 1  furthermore comprises an additional light source  78 , which, in the first exemplary embodiment, is provided only on one of the longitudinal sides  32  of the light exit region  31  and is received in a receptacle region  98  in the profiled component  6 . During operation, the additional light source  78 , facing the interior  5 , emits light into the interior  5 , as a result of which the channel  3  itself is illuminated (“glowing”). With the light providing devices  36  implementing directional emission directly through the light exit region  31 , an interesting aesthetic effect thus arises wherein, in a very discreet manner, an emitter or spot emits from a slot that is itself indirectly luminous. 
     In the case of the lighting arrangement  1  in accordance with  FIG. 1 , the inner surface regions  5   a - e  and, for example, at least also the surface of the profiled component  6  in the widening region  29  are colored brightly, for example colored white, whereby the effect of “glowing” is manifested particularly well. 
     In a variant of the first exemplary embodiment in which additional light sources  78  are omitted and no backlighting of the interior  5  and hence no “glowing” are sought, the inner surface regions  5   a - e  and, for example, at least also the surface of the profiled component  6  in the widening region  29  can be colored dark, for example black. In the case of such a variant, it is possible to obtain the impression that the light providing device  36  is emitting from a dark hole. It is possible to achieve a different aesthetic effect, therefore, wherein the light providing device  36  appears to hover in a dark hole. 
     In the first exemplary embodiment, the additional light source  78  can be designed in the same way as will be explained in even greater detail further below, in particular with reference to  FIGS. 33-35 , in relation to the second exemplary embodiment. 
       FIG. 2  illustrates a rectilinearly running section of the channel  3  of the lighting arrangement  1  in accordance with  FIG. 1  as seen from the visible side S of the intermediate ceiling  10 . From the visible side S, essentially the light exit region  31  of the channel  3  is visible as an elongated slot, laterally delimited by the profiled components  6 . Moreover,  FIG. 2  shows by way of example a light providing device  36  that emits centrally directly through the light exit region  31 . Along its longitudinal direction  3   a , the channel  3  is constructed with a plurality of channel sections  3   b  extending rectilinearly in each case. The channel sections  3   b  are constructed in each case with a section of the housing component  4  and sections of the profiled components  6  and form, with busbar sections  95   b  and additional light sources  78  arranged therein, rectilinear units  2  which are connected to one another rectilinearly along the longitudinal direction  3   a  of the channel  3  at connecting locations  3   c , one of which is shown by way of example in  FIG. 3 . The channel sections  3   b , additional light sources  78  or sections thereof and the busbar sections  95   b  can in this case be of substantially identical length. In this way, the units can be combined to form an overall arrangement of any desired length. In order to produce the connection of adjacent units  2 , connecting components  21  and  22  configured for the rectilinear connection are provided in the case of the exemplary embodiment in  FIG. 3 . The connecting components  21  are configured to enable the electrical coupling of adjacent busbar sections  95   b , while the connecting components  22  serve for mechanically coupling the channel sections  3   b  adjoining one another. The number of units  2  can vary depending on the desired overall length of the channel  3 , wherein the length of a unit  2  can be chosen suitably in order that the units  2  can be handled well. 
     At end faces the channel  3  is closed by an end terminating piece  20  in each case. This is illustrated schematically and by way of example in  FIG. 4 . 
     However, the invention enables not just lighting arrangements  1  comprising a rectilinear channel  3 . Instead, individual units  2 , see  FIGS. 5 and 6 , can be connected to one another at a connecting location  3   c  in a manner angled relative to one another, for example at right angles. As a result, a slot running in a manner angled by an angle β of 90 degrees, for example, said slot forming the light exit region  31 , is obtained on the visible side S. In order to achieve such a course of the channel  3 , in  FIGS. 5, 6  adjacent units  2 , which are in each case rectilinear but trimmed obliquely with rectilinear channel sections  3   b  are coupled at the connecting location  3   c  using suitable connecting components  21 ′,  22 ′, wherein the connecting components  21 ′ are designed for the electrical coupling of busbar sections  95   b  at an angle of β=90 degrees and the connecting components  22 ′ are designed for the mechanical coupling of the channel sections  3   b  at an angle of β=90 degrees. Correspondingly designed connecting components  21 ′,  22 ′ are schematically depicted by way of example in  FIG. 6 . In this case, the longitudinal direction  3   a  of the channel  3  as a whole thus runs in a manner angled by 90 degrees at the location  3   c . Connections of adjacent units  2  in a manner angled by other angles β, for example by 30 degrees, 45 degrees, 60 degrees, 120 degrees, 135 degrees of 150 degrees relative to one another, are conceivable, however. 
     A lighting arrangement  101  in accordance with a second exemplary embodiment of the invention is described in greater detail below with reference to  FIGS. 19-35 . Apart from the differences described in detail below, the above explanations concerning the first exemplary embodiment also apply to the second exemplary embodiment, such that in this regard reference is made to the above explanations concerning the first exemplary embodiment. 
     The lighting arrangement  101  once again comprises a channel  3  formed with a housing component  104  and two profiled components  106 . The profiled components  106  are manufactured, e.g. extruded, as elongated profiles composed of a metal material, in particular aluminum or an aluminum alloy material. In the case of the second exemplary embodiment, however, the housing component  104  is formed as a sheet-metal part, in the transverse direction in one piece comprising wall and cover sections  4   a ,  4   b ,  4   e , wherein the housing component  104  is manufactured from steel sheet, for example. The cross section of the housing component  104  is rectangular with planar wall and cover sections  4   a ,  4   b ,  4   e  and also rounded corners at the transitions from the cover section  4   e  into the wall section  4   a  and  4   b . As in the case of the first exemplary embodiment, the housing component  104 , too, is substantially closed by wall sections  4   a ,  4   b  at the longitudinal sides, which run vertically in  FIGS. 19 and 20 , and by a cover section  4   e  on the top side, which is aligned horizontally in  FIG. 20 , and has an open side  4   f  in the region of the underside situated opposite the top side. The underside of the housing component  104  is terminated by the profiled components  106 , which are secured at the housing component  104  in connecting regions  106   a.    
     The lighting arrangement  101  comprises two differently designed light providing devices  36  and  136  by way of example in  FIGS. 19, 20, 21, 22 . Both the light providing devices  36  and the light providing devices  136  are dimensioned and designed in each case in a suitable manner in order to be arranged within the interior  5  of the channel  3 . In the case of the second exemplary embodiment, too, both light providing devices  36 ,  136  are designed as emitters with narrow emission or “spots”. 
     The light providing device  36 , illustrated in  FIGS. 19, 20, 21, 22 , has already been explained in greater detail above with reference to  FIGS. 7-15  and is designed as in the case of the first exemplary embodiment. The light providing device  136  is illustrated in greater detail in  FIGS. 26-29 , but differs from the light providing device  36  essentially in that the light providing device  136  comprises a cross-sectionally round functional section  145  having a diameter D that is designed to be longer than in the case of the light providing device  36 . The electrical power of the light providing device  136  can correspond to that of the light providing device  36  or be different therefrom as necessary, e.g. can be greater than the power of the light providing device  36 . The diameter D of the functional section  145  is smaller than a width B of the light exit region  31 , see also  FIG. 20 . In the case of the second exemplary embodiment, therefore, light providing devices  36 ,  136  are provided which differ in their size in particular in their length in the example shown, and moreover can have different electrical powers. The diameters D of the light providing devices  36 ,  136  can be identical or different. 
     In the same way as described above for the light providing device  36  with respect to the first exemplary embodiment, the light providing devices  36  and  136  are magnetically coupleable to the housing component  104  and also positionable and alignable in order to emit in the desired direction through the light exit region  31 . 
     The profiled components  106  each have a groove  8   a  in the connection region  106   a , in which groove, in the assembled state of the channel  3 , an edge of the housing component  104  becomes located in the region of the open side  4   f . In this respect, see in particular  FIGS. 19, 20 and 20A . Using screws  14  that are led through suitable holes in the housing component  104  and are screwed into a further groove  8   b  of the profiled component  106 , said groove facing the edge of the housing component  104 , the housing component  104  can be screwed to the profiled component  106  and thus be secured at the latter in the connection region  106   a.    
     Furthermore, each of the profiled components  106  is equipped with channel-like grooves  8   c  and  8   d , which in each case face the interior  5  and thus face away from that side of the profiled component  106  which becomes located on the plate element  9  in the installed state. 
     The groove  8   c  receives a busbar  95  and thus forms a receptacle region  96  for the latter, see in particular  FIGS. 20A and 23 . The busbar  95  is embodied as a two-phase busbar and designed with a main body  97   a  and two electrical conductors  97   b . The groove  8   c  is provided with ribs  15   c  and  15   c ′ along its longitudinal direction at the opposite groove walls, in the vicinity of the base of the groove  8   c , symmetrically with respect to the center of the groove. The main body  97   a  of the busbar  95  engages behind the lower ribs  15   c  situated opposite one another in order to hold said busbar in the groove  8   c.    
     The groove  8   d  receives the additional light source  78 , see for example  FIGS. 19, 20, 20A , and thus forms a receptacle region  98  for the additional light source  78 . In order to hold the additional light source  78  in the desired position within the groove  8   d , the opposite groove walls of the groove  8   d  each have a rib  15   d , wherein the ribs  15   d  are arranged symmetrically with respect to the center of the groove  8   d , in such a way that in the mounted state a covering  82  of the additional light source  78 , see the explanations further below concerning  FIGS. 33-35 , bears on upper edges of the groove walls of the groove  8   d , see  FIG. 20A . 
     The additional light source  78 , which can be used both in the first and in the second exemplary embodiments of the present invention, is shown in greater detail in  FIGS. 33-35 . The additional light source  78  is designed as an elongated insert in order to be inserted into the groove  8   d . The additional light source  78  comprises a circuit board  80 , which is secured on a basic profile  83 . Light emitting diodes (LEDs)  81  are arranged on the circuit board  80 , only one of which diodes is visible in  FIGS. 34, 35 . Moreover, conductor tracks and possibly required further electronic components for the operation of the LEDs  81  can be arranged on the circuit board  80 . The circuit board  80  is connected to a suitable current source in a manner not illustrated in specific detail in the figures. 
     The circuit board  80  and the LEDs  81  are covered, see  FIGS. 34 and 35 , using an opalescent covering  82 , wherein the opalescent covering is designed by way of example as a profile composed of a suitable plastic, for example satin-finished PMMA. The opalescent covering  82  engages over the circuit board  80  and engages on both sides thereof into lateral longitudinal grooves of the basic profile  83 . 
       FIG. 20  shows that, in the case of the second exemplary embodiment, two additional light sources  78  are provided, which are arranged in each case facing the interior  5  in the groove  8   d  of a profiled component  106 . The light sources  78  can bear on the ribs  15   d  and/or be configured to snap in place behind the latter. Consequently, in the case of the second exemplary embodiment, additional light sources  78  are arranged on both longitudinal sides  32  of the light exit region  31 . Between the light exit region  31  and each of the additional light sources  78  there is situated a section of the profiled component  106  whose groove  8   d  receives the light source  78 , as a result of which the additional light source  78  cannot be seen from the visible side S. 
     The additional light sources  78  emit light into the interior  5  during operation, as a result of which the channel  3  is illuminated. As in the case of the first exemplary embodiment, however, direct light emission through the light exit region  31  toward the outside is not effected by the light sources  78 , rather the light emitted by the light sources  78  passes to the observer only indirectly by virtue of the channel  3  being backlit. The interior  5  thereby itself gives the impression of being luminous (“glowing”). The aesthetically appealing impression of a luminous light exit slot can be achieved thereby, wherein from the luminous slot the light providing devices  36 ,  136  can then directionally irradiate an object situated in a space. 
     As in the case of the first exemplary embodiment, in the case of the second exemplary embodiment, too, in one variant thereof, the “glowing” and hence the indirect illumination of the interior  5  can be dispensed with, that is to say that the additional light sources  78  can be omitted in the case of such a variant. With regard to the coloration of the inner surface regions  5   a ,  5   b ,  5   e  and the profiled component  6 , in particular in the region  29 , reference is made to the above explanations concerning the first exemplary embodiment. 
     The provision of additional light sources  78  on both sides of the light exit region  31  and the utilization of an opalescent covering  82  contribute to a particularly uniform, homogenous, indirect backlighting of the channel  3 . The additional light sources  78  can extend parallel to the light exit region  31  along the entire longitudinal direction  3   a  of the channel  3 . In order to facilitate transport and mounting, the additional light sources  78  can be divided in each case into sections succeeding one another in the longitudinal direction, for instance as shown in  FIG. 33 . 
     In the case of the second exemplary embodiment, a respective busbar  95  is moreover provided on each longitudinal side  32  of the light exit region  31  and parallel to the latter. Thus, in the case of the second exemplary embodiment, the profiled components  106  are equipped symmetrically with busbars  95  and additional light sources  78 . 
     As in the case of the first exemplary embodiment, in the case of the second exemplary embodiment, too, electric current at a voltage of 48 volts is provided using the busbars  95 . This is carried out using the two conductors  97   b , which can be connected to a suitable transformer. In the case of the second exemplary embodiment, too, each of the light providing devices  36  and  136  is electrically connected to an assigned connection adapter  199  via an electrical line  85 , in each case in the form of an electrical cable. Electric current is tapped off from the conductors  97   b  of the busbar  95  by the connection adapter  199 . As explained thoroughly above with regard to the first exemplary embodiment, in the case of the second exemplary embodiment, too, the supply lines  85  are designed in such a way that they can in each case be magnetically coupled to the channel  3  and in particular to the housing component  104  with the advantages mentioned above. 
     The connection adapter  199  is illustrated in greater detail in  FIGS. 30A-G  and  3 I. The connection adapter  199  of substantially parallelepipedal design comprises an adapter housing  200  formed with an adapter housing part  200   a  as upper part and an adapter housing part  200   b  as lower part. The adapter housing parts  200   a  and  200   b  are formed in each case with a plastics material. A printed circuit board  191  is clamped in between the plastic adapter housing parts  200   a  and  200   b . In one variant of the second exemplary embodiment, a device  192  that makes it possible to wirelessly receive control signals for switching and/or controlling the light emission of the light providing device  36  or  136  can be arranged on the printed circuit board  191 . Further devices can be provided on the printed circuit board  191 , in particular a computing device for processing the control signals and/or a driver component in order to vary the intensity of the light emission by the light providing device  36  or  136  in accordance with the control signals. In particular, the device  192  can be a ZigBee module, or the device  192  can be part of such a module arranged on the printed circuit board  191 . In one variant, however, instead of being integrated into the connection adapter  199 , the device  192  could be integrated into the light providing device  36  or  136  itself. 
     The connection adapter  199  is equipped with two movable snap-action hooks  201  in the region of one of its ends at the opposite longitudinal sides of the connection adapter  199 . Furthermore, an actuation element  203  is provided on the end face in the region of the end of the connection adapter to which the snap-action hooks  201  are adjacent. As a result of the actuation element  203  being pushed in, the snap-action hooks are withdrawn or retracted into the adapter housing  200 . A suitable mechanism can be provided within the adapter housing  200 . Moreover, two latching lugs  202  additionally protrude at the other end of the connection adapter  199 , likewise at the opposite longitudinal sides thereof. 
     The snap-action hooks  201  and latching lugs  202  form latching devices that make it possible to couple the connection adapter  199  in a latching and re-releasable manner to the profiled component  106  in the region of the groove  8   c . For this purpose, the snap-action hooks  201  and latching lugs  202  engage behind the ribs  15   c ′, which are of beveled design at their top side, whereby the connection adapter  199  is held at the component  106 , see e.g.  FIG. 23 . If the actuation element  203  is actuated for releasing the connection adapter  199  from the groove  8   c , the snap-action hooks  201  retract into the adapter housing  200  and are disengaged from the rib  15   c′.    
     The connection adapter  199  can thus be inserted into the groove  8   c  at an arbitrary, freely selected location along the channel  3 , in order to tap off current from the busbar  95  and to supply a flexibly positionable light providing device  36  or  136  with current. In order to produce an electrical contact with the conductors  97   b  of the busbar  95 , the connection adapter  199  comprises contact elements  204  designed in a pinlike fashion or as “tapping pins”, wherein the contact elements  204  are in contact with a respective one of the conductors  97   b  after latching securing of the connection adapter  199  in the groove  8   c.    
       FIG. 31  furthermore shows the line  85  for supplying the light providing device  36  or  136 . The line  85  enters the adapter housing  200  in an entrance region  205 , wherein a strain relief mechanism for the line  85  is integrated into the plastic adapter housing parts  200   a ,  200   b.    
     In the case of the second exemplary embodiment, too, the lighting arrangement  101  can be formed with units  2  comprising channel sections  3   b  and busbar sections  95   b  and also additional light sources  78  or sections thereof, which extend in particular in each case over the length of the unit  2 . In the case of the second exemplary embodiment, too, the units  2  are connected to one another with the aid of connecting components  121 ,  122 , for example rectilinearly as already explained above with reference to  FIGS. 2, 3 . 
     The connecting components  121  are configured to electrically connect busbar sections  95   b  of adjacent units  2  to one another. For this purpose, at a connecting location  3   c  a connecting component  121  is inserted into the groove  8   c  in such a way that it engages over the connecting location  3   c . See  FIGS. 19 and 22 , for example. The connecting component  121  is illustrated in greater detail in  FIGS. 32A-F . 
     The connecting component  121  comprises a component housing  220  formed with two parts, for example, wherein movable snap-action hooks  221   a ,  221   b  are arranged at the four corners of the parallelepipedal connecting component  121  at the longitudinal sides thereof. Furthermore, the connecting component  121  has in each case an actuation element  223   a  and  223   b , respectively, at opposite end faces. 
     For actuation purposes, the actuation elements  223   a  and  223   b  can be pressed in, in a similar manner to the actuation element  203  of the connection adapter  199 , as a result of which the snap-action hooks  221   a ,  221   b , which protrude from the component housing  220  without actuation of the actuation elements  223   a ,  223   b , can be retracted into the component housing  220 . In this case, for example, the actuation element  223   a  can act on the snap-action hooks  221   a  at one end of the component housing  220  and the actuation element  223   b  can act on the snap-action hooks  221   b  at the other end of the component housing  220 . 
     The snap-action hooks  221   a ,  221   b  in this case form latching devices that make it possible to couple the connecting component  121  in a latching and re-releasable manner to two mutually adjoining sections of a profiled component  106  at the connecting location  3   c . The snap-action hooks  221   a  and  221   b  in this case engage behind the ribs  15   c ′, as a result of which the connecting component  121  is held at the sections of the component  106 . As a result of the actuation elements  223   a,b  being actuated, the snap-action hooks  221   a,b  can retract into the component housing  220 , as a result of which the snap-action hooks  221   a,b  are disengaged from the rib  15   c ′ and the connecting component  121  can be removed again. 
     In order to produce an electrical coupling of the busbar sections  95   b  that meet in the connecting location  3   c , the connecting component  121  comprises two pairs of contact elements  224   a  and  224   b , see  FIGS. 32A and 32E . The contact elements  224   a,b  make contact with the conductors  97   b  upon the insertion of the connecting component  121  into the groove  8   c  on both sides of the connecting location, in such a way that the contact elements  224   a  connect sections of one conductor  97   b  and the contact elements  224   b  connect sections of the other conductor  97   b  across the connecting location  3   c . For this purpose, the contact elements  224   a , on the one hand, and the contact elements  224   b , on the other hand, are electrically connected to one another in the component housing  220 . 
     The connecting components  122  are provided for the mechanical coupling of the units  2  and are illustrated in more specific detail in  FIGS. 25A-C . The utilization of the connecting components  122  is shown in  FIGS. 19-24 , for example. In particular,  FIG. 20A  clearly shows that each of the profiled components  106  is provided with two further grooves  8   e  and  8   f , wherein the grooves  8   e ,  8   f  are embodied in each case with an undercut, that is to say that the profile of the grooves  8   f ,  8   e  is T-shaped or inverted T-shaped. Apart from the orientation, the cross section of the grooves  8   e  and  8   f  is of identical design. 
     The connecting component  122  is designed as a section of a profile, for example of a metal profile, having a substantially T-shaped cross section, wherein the cross section of the connecting component  122  is chosen in such a way that the connecting component can be introduced into the groove  8   e  or  8   f . Furthermore, the connecting component  122  comprises a plurality of threaded holes  123 , for example four thereof, along its longitudinal direction, into which threaded holes screws  124  can be screwed, see for example  FIG. 20A ,  FIG. 24 . In the case of the second exemplary embodiment, four connecting components  122  for mechanically coupling the units  2  are provided at each connecting location  3   c  between two units  2 , see for example  FIG. 20 , wherein each connecting component  122  is introduced into a groove  8   e  or  8   f  of one unit  2  and into a groove  8   e  or respectively  8   f  of the other unit  2 . 
     Of the four connecting components  122  at the connecting location  3   c , two of the connecting components  122  are arranged in the outer area in the transverse direction of the channel  3  and are inserted into the grooves  8   f . These outer connecting components  122  are designated by the reference sign  122   a , see  FIG. 19 , for example. Two further connecting components  122  are designated by the reference sign  122   b  and are arranged in the inner area in the transverse direction of the channel  3 , adjacent to the boundary  33 . By the screws  124 , the connecting component  122  can be secured, for example clamped, in the groove  8   e ,  8   f . In the case of the outer connecting components  122   a , provision can be made for the fixing of the connecting component  122  to be effected only in the corresponding groove  8   f  of one of the units  2 . 
     It should be mentioned that the connecting components  122  in  FIGS. 25A-C  and the connecting components  121  in  FIGS. 32A-F  can in each case also be configured for an angular coupling of channel sections  3   b  and busbar sections  95   b , for instance by angled configuration of the connecting components  121 ,  122 , in a manner similar to that indicated for the connecting components  21 ′,  22  in  FIG. 6 . 
     In one variant of the second exemplary embodiment, however, for implementing a course of the channel  3  angled by an angle, for instance by β=90 degrees, in addition to rectilinear units  2 , provision is made of a unit  2 ′ designed as a corner piece with a channel corner section  3   d  as a further unit, see  FIG. 44 . In this case, the housing component  104 , the profiled components  106  and the sections—inserted into these—of the additional light source(s)  78  and of the busbar(s)  95  have been brought into the arrangement angled by the angle β already in the unit  2 ′ designed as a corner piece. By way of example, busbar(s)  95  and also additional light source(s)  78  run through the channel corner section  3   d  around the corner. 
     In  FIG. 44 , a respective rectilinear unit  2  is coupled to the unit  2 ′ at a respective connecting location  3   c . This can be effected for example mechanically by the connecting components  122  from  FIGS. 25A-C , said connecting components being designed as rectilinear profiles. The electrical coupling of the busbars can once again be effected with the aid of connecting components  121  (not depicted in  FIG. 44  for the sake of better clarity). 
     It should be mentioned that the unit  2 ′ designed as a corner piece can also be designed for a different angle β, for example an angle β of 30 degrees, 45 degrees, 60 degrees, 120 degrees, 135 degrees or 150 degrees, or any other desired angle. 
       FIG. 36  shows how, in the case of the second exemplary embodiment of the invention, the channel  3  can be closed by an end terminating piece  120  at one of the open end faces, for example at both open end faces. The channel sections  3   b  are provided with tabs  125  at their open end faces, see  FIGS. 19-22 , wherein the tabs  125  here are in each case part of a section of the housing component  104 . The end terminating piece  120  in  FIG. 36  is designed as a sheet-metal part and is manufactured from steel sheet, for example, and comprises lateral tabs  125 ′, which are designed and arranged in a manner corresponding to the tabs  125  of the housing component  104 . Using the tabs  125 ,  125 ′, the end terminating piece  120  can be connected to the housing component  104 , for instance using screws, in order to secure the end terminating piece  120  at the end face of the channel  3 . 
       FIG. 36  furthermore shows that the end terminating piece  120  is equipped with passage openings  120   a , through which feed-in lines  160  for feeding electric current into the busbars  95  can be led through the end terminating piece  120 . The feed-in lines  160  can in each case be electrically coupled to a suitable current source, not illustrated in  FIG. 36 , for instance a suitable transformer, wherein the current source is situated outside the channel  3 . 
     At that end of each of the feed-in lines  160  which is situated in the interior  5 , the feed-in lines  160  are in each case electrically coupled to a feed-in component  150 . Each of the feed-in components  150 , which are not visible in  FIG. 36 , enables the supply of one of the two busbars  95  in the second exemplary embodiment. 
     A feed-in component  150  is illustrated in greater detail in  FIGS. 37A to 37G and 38 . Analogously to the connection adapter  199  already explained above, the feed-in component  150  is of substantially parallelepipedal design and comprises a component housing formed with a component housing part  150   a  as upper part and a component housing part  150   b  as lower part, wherein the component housing parts  150   a  and  150   b  are formed in each case with a plastics material. 
     Analogously to what is provided in the case of the connection adapter  199 , the feed-in component  150  is equipped with two movable snap-action hooks  151   b  in the region of one of its ends at opposite longitudinal sides. An actuation element  152  is provided at the end face in the region of the end of the feed-in component  150  to which the snap-action hooks  151   b  are adjacent, wherein once again as a result of the actuation element  152  being pushed in, the snap-action hooks  151   b  can be withdrawn. As in the case of the connection adapter  199 , in the case of the feed-in component  150 , too, for this purpose a suitable mechanism can be provided within the component housing. At the other end of the feed-in component  150 , two latching lugs  151   a  additionally protrude at the opposite longitudinal sides thereof. The snap-action hooks  151   b  and latching lugs  151   a  form latching devices in order to couple the feed-in component  150  in a latching and re-releasable manner to the profiled component  106  in the region of the groove  8   c , wherein once again the snap-action hooks  151   b  and latching lugs  151   a  engage behind the ribs  15   c ′. If the actuation element  152  is actuated, then the snap-action hooks  151   b  are withdrawn and disengage from the ribs  15   c ′, and the feed-in component  150  can be released from the groove  8   c.    
     Within the interior  5 , for example in the end region of the busbar  95  and adjacent to the end terminating piece  120 , the feed-in component  150  can be inserted into the groove  8   c  in order to feed current in the busbar  95 . For this purpose, the feed-in component  150  comprises contact elements  154   a,b  at its underside, wherein each of the contact elements  154   a,b  makes contact with one of the conductors  97   b  of the busbar  95  after the latching of the feed-in component  150  into the groove  8   c . The contact elements  154   a,b  are coupled to conductors of the feed-in line  160  in the interior of the feed-in component  150  in a suitable manner in order to be able to supply the busbar  95 .  FIG. 38  shows how the feed-in line  160  enters the feed-in component  150  in an entrance region  153 , wherein a strain relief mechanism for the feed-in line  160  can be integrated into the component housing parts  150   a  and  150   b.    
     A lighting arrangement  1 ,  101  in accordance with one of the exemplary embodiments described above can be constructed in the following manner. 
     Firstly—for example in the manner of a construction kit—for the formation of the lighting arrangement  1 ,  101  comprising a plurality of channel sections  3   b  and possibly  3   d , provision is made of the required number of sections of the housing component  4  or  104 , the required number of sections of the profiled components  6  or  106 , the connecting components  21 ,  22 ,  21 ′,  22 ′ or  121 ,  122  required for the channel form to be realized, and also the desired number of light providing devices  36  and/or  136  with in each case a line  85  and a connection adapter  99  or  199 . 
     In this case, the busbars  95  and the additional light sources  78  may already have been installed in one or both of the profiled components  6 ,  106 . Alternatively, for example, the additional light sources  78  could be provided separately as part of the construction kit, wherein they are then also inserted into the receptacle region  98 . 
     Channel sections  3   b  are assembled from the sections of the housing component  4  or  104  and the sections of the profiled components  6 ,  106 , which are secured to one another, and, together with the additional light source(s)  78  and busbar(s)  95  installed in the profiled component(s)  6 ,  106 , form a unit  2 . A plurality of units  2  can be preassembled in this way. The units  2  can be provided for a customer for example already in preassembled form. If a further unit  2 ′ having a channel corner section  3   d  or a plurality of units  2 ′ is/are required for the desired channel form, the unit(s)  2 ′ may likewise be provided in preassembled fashion with busbar(s)  95  and additional light source(s)  78  already installed therein. 
     End faces of units  2  which later are intended to be closed as end faces of the channel  3  are closed with the end terminating pieces  20  or respectively  120 . Already at this point, in the case of the second exemplary embodiment, the feed-in component(s)  150  can be coupled in one of the units  2 , which comprises an end terminating piece  120 . The feed-in line  160  or the feed-in lines  160  is/are able to be guided through the passage openings  120   a  of the end terminating piece  120  already in this step. 
     The units  2  provided in this way, with the busbar(s)  95  and possibly additional light source(s)  78  arranged therein, can be brought behind the intermediate ceiling  10  and combined in the manner described below. 
       FIG. 20  illustrates an entire width B 3  of the channel  3  for the channel  3  of the second exemplary embodiment. Furthermore,  FIG. 20  illustrates a height H 3  of the channel  3 , which is measured from the outer side of the cover section  4   e  vertically as far as the boundary  33  of the light exit region  31 . Furthermore, a width W of the slot  10   a  is depicted in  FIG. 20 . A distance between the bare ceiling R and the plate elements  9  of the intermediate ceiling  10  is designated by T 10  and illustrated in a shortened manner in  FIG. 20 .  FIG. 1  shows the dimensions B 3 , H 3 , T 10  and W for the first exemplary embodiment, the distance T 10  in turn being shown in a shortened manner. 
     The slot  10   a  having a suitable width W is introduced, e.g. cut, into a suspended intermediate ceiling  10 , which has already been fixedly installed at a bare ceiling R, wherein the course of the slot  10   a  is chosen in a manner corresponding to the course of the desired light exit region  31 . The slot  10   a  can extend e.g. in the ceiling region of a space through the entire space or a large part thereof and can be straight or singly or multiply angled. Alternatively, the slot  10   a  could run in the wall region. 
     For mounting the channel  3  behind the intermediate ceiling  10 , see  FIG. 43 ( a ) , a for example rectilinear unit  2  with one of the wall sections  4   a ,  4   b  ahead can be introduced through the slot  10   a  in the intermediate ceiling  10  into the interspace between the latter and the bare ceiling R (not illustrated in  FIG. 43 ), behind the intermediate ceiling  10  can be rotated about a longitudinal axis of the unit  2  by 90 degrees and can be placed onto the intermediate ceiling  10  from the rear side, that is to say from the side S′, see  FIG. 43 ( b ) . For this purpose, the distance T 10  is chosen in relation to the dimensions of the channel  3 , in particular to the width B 3 , in such a way that the movement illustrated in  FIGS. 43( a ) and ( b )  is implementable. 
     Longer and angled channels  3  are placed behind the intermediate ceiling  10  in a plurality of segments. This is done in such a way that for example rectilinear units  2  are successively brought behind the intermediate ceiling  10 , in the manner illustrated in  FIG. 43 . After the insertion of the units  2  behind the ceiling  10 , these are positioned and connected in the region of the connecting location  3   c . For this purpose, the procedure adopted can be for example such that the connecting components  122  are inserted into the groove  8   e  or the groove  8   f  before the introduction of a first one of the units  2  behind the ceiling  10  and are respectively fixed in said groove using the screws  124 . A first unit  2  prepared in this way is brought behind the ceiling  10  through the slot  10   a  and is positioned on the rear side of said ceiling e.g. in the correct position along the slot  10   a . Afterward, a unit  2  to be connected thereto is likewise brought behind the ceiling  10  through the slot  10   a , wherein this second unit  2  was not provided with connecting components  122  at the connecting location  3   c . By a displacement movement for example of the second unit  2  along the slot  10   a  toward the other, first unit  2 , the connecting components  122  can also be introduced into the grooves  8   e ,  8   f  of the second unit  2 . 
     For fixing the units  2  to one another at the connecting location  3   c , the inner connecting components  122   b  are also fixed in the groove  8   e  of the second unit  2  from the visible side S using screws  124 . For this purpose, the grooves  8   e  in the inserted state of the unit  2 , see e.g.  FIG. 20 , are arranged between the edge  9   a  and the boundary  33 . In this case, the outer connecting components  122   a  remain fixed only in the grooves  8   f  of the first of the units  2  and serve in particular for the improved guidance of the units  2  in relation to one another. 
     In the case of an angled channel  3 , the unit  2 ′ designed as a corner piece can be introduced between the bare ceiling R and the intermediate ceiling  10  in a manner analogous to that as described above for the rectilinear units  2 . The dimensions of the unit  2 ′, in particular of the channel corner section  3   d , are chosen in relation to the distance T 10  in such a way that insertion is possible analogously to  FIG. 43 . The mechanical connection of the unit  2 ′ to the adjoining units  2 , cf.  FIG. 44 , is effected analogously to the connection of two rectilinear units  2 , as described above, in two connecting locations  3   c.    
     The channel  3  can be fixed using holding means, not shown, at the plate elements  9  of the intermediate ceiling  10 . From the visible side S, the transition region in the region of the edges  9   a  of the plate elements  9  as far as the boundary  33  of the light exit region  31 , see  FIG. 20 , for instance, is covered with filler. 
     After the units have been mechanically fixed to one another, the busbars  95  can subsequently be electrically connected to one another across the connecting locations  3   c  by the connecting components  21 ,  21 ′ or  121 . This can be carried out through the opening  28 . 
     The insertion and adjustment of the light providing devices  36 ,  136  may advantageously be carried out after the installation of the channel  3  behind the intermediate ceiling  10  from the visible side S thereof. 
     Once the installation of the channel  3  with the light sources  78  and busbars  95  into the ceiling  10  has been concluded, in a subsequent step, through the opening  28 , the desired number of light providing devices  36  and/or  136  can be introduced into the interior  5  and in each case be coupled to the channel  3 , as described above. The magnetic coupling using the permanent magnets  55  allows the introduced light providing devices  36  and/or  136  to be positioned in the interior  5  very variably and to be displaced back and forth slidingly at the channel  3  over the length thereof and additionally to be rotated until the desired lighting effect by light emission through the light exit region  31  toward the outside can be achieved. Pivoting about the pivot axis  48  enables further flexibility. For operation, the light providing devices  36 ,  136  are held within the interior  5  by magnetic force. The insertion of the light providing devices  36 ,  136  and the arrangement thereof in the interior  5 , and also the coupling and adjustment can be carried out through the opening  28 . 
     When the channel  3  is installed behind the intermediate ceiling  10 , it is additionally ensured that the busbars  95  are connected or can be connected to a current source, for instance a transformer, by the feed-in lines  160 . The light providing devices  36 ,  136  can be supplied with current particularly simply and flexibly with the aid of the busbars  95  arranged on both sides of the light exit region  31  in the case of the second exemplary embodiment. The connection adapter  199  respectively provided, after the mounting of the channel  3  with the busbar(s)  95  and possibly the additional light source(s)  78  behind the intermediate ceiling  10  through the opening  28 , at a freely selectable location, can be coupled to one of the busbars  95 , depending on the desired positioning of the light providing device  36  or  136  on one side or the other of the light exit region  31 , for tapping off current. By way of example, in the case of a light providing device positioned rather on the left, the busbar  95  provided on the left-hand side of the center axis M can be utilized for supply and, in the case of a light providing device positioned rather on the right, the busbar  95  provided on the right-hand side of the center axis M can be utilized for supply. Consequently, even in the case of long channels  3 , for example a channel  3  having a length of several meters, short paths that are bridged by the line  85  nevertheless result. The supply line  85  situated in the interior  5  is neatly arranged and guided by magnetic adhesion of the line  85  at the housing component  4  or  104  within the interior  5 , without sagging or causing a disturbance. The light emission of the light providing devices  36 ,  136  is switched and/or controlled wirelessly with the aid of the device  192 , in particular with use of the so-called Zig Bee specification. A complicated cabling for the purpose of controlling the light providing devices  36 ,  136  is avoided in this way and a very flexibly controllable lighting arrangement  1 ,  101  is provided. 
     A lighting arrangement  101 ′ in accordance with one variant of the second exemplary embodiment is illustrated in  FIGS. 45 and 46  and differs from the lighting arrangement  101  only in the differences described below. In the case of the lighting arrangement  101 ′, holding devices  107  are secured at the channel  3  at intervals along the latter. The holding devices  107  are provided for securing the channel  3  at the solid, load-bearing bare ceiling R. The holding devices  107  are designed as angle pieces and are fixedly connected to the channel  3  using the screws  14 . For securing the channel  3  at the bare ceiling R, ropes  117  are additionally provided, see  FIG. 46 , only one of said ropes being shown by way of example in  FIG. 46 . The channel  3  is suspended from the bare ceiling R via the ropes  117  and the holding devices  107 . The loading on the plate elements  9  can be relieved in this way. In this case, although the profiled components  6  can be seated on the plate elements  9 , at least part of the weight of the channel  3  and of the structural elements coupled thereto is supported directly at the bare ceiling R. The holding devices  107  and ropes  117  can be provided as part of the construction kit, wherein holding devices  107  can already be secured at the channel  3 . 
     Some further modifications of the second exemplary embodiment are illustrated schematically in  FIGS. 39A-B ,  40 A-B,  41 A-B and  42 A-B. 
     In the case of the lighting arrangement  301  in accordance with the modification in  FIGS. 39A, 39B , instead of light providing devices  36 ,  136 , two light providing devices  336   a ,  336   b  are provided and both are arranged in the interior  5  in order to emit light L through the light exit region  31  toward the outside. The light providing device  336   a  has overall a linearly elongated, parallelepipedal shape, wherein the light providing device  336   a  has a plurality of individual light emission regions  336   a ′ on its side facing the light exit region  31  in  FIG. 39A . The coupling of the light providing device  336   a  to the channel  3  and also the electric current supply and the control/switching are carried out as in the case of the light providing devices  36 ,  136 . However, over and above the positionability using the magnetic coupling, the light providing device  336   a  is not inherently adjustable and in  FIG. 39A  emits light directionally vertically through the light exit region  31  downward.  FIG. 39A  furthermore indicates in a dash-dotted manner that the light providing device  336   a  could also be positioned centrally above the light exit region  31 . 
     A longitudinal extent L′ of the light providing device  336   a  is greater than the width B of the light exit region  31 . In parallel alignment of the elongated shape of the light providing device  336   a  with respect to the light exit region  31 , said light providing device can be introduced into the interior  5  from the visible side S, wherein the light providing device  336   a  in  FIG. 39B , in the coupled state, likewise extends parallel to the light exit region  31  above the latter. 
     The light providing device  336   b  comprises a functional section  345  formed with a linearly elongated, parallelepipedal shape, wherein once again a longitudinal extent L′ of the parallelepipedal shape significantly exceeds the width B of the light exit region  31 . The light providing device  336   b  furthermore comprises a base section  346 , which is pivotably coupled to the functional section  345 , as a result of which the emission direction of the light providing device  336   b  can be adjusted in a manner similar to that in the case of the light providing devices  36  or  136 . 
     In parallel alignment of the elongated shape with respect to the light exit region  31 , the light providing device  336 , too, can be introduced into the interior  5  from the visible side S.  FIG. 39B  shows the alignment of the elongated shape parallel to the light exit region  31  in the coupled state, wherein the functional section  345  is pivoted for the directional emission of light L through the light exit region  31  toward the outside, see  FIG. 39A . The light providing device  336   b  could alternatively be coupled to the channel  3  in the wall region  5   a  or  5   b.    
     The light providing devices  336   a  and/or  336   b  can also be combined with a light providing device  36  and/or  136  in the same lighting arrangement. For accurate positioning, the light providing devices  336   a ,  336   b  can also be slidingly displaced and possibly rotated at the channel  3 . 
     Additional light providing devices  437 ,  537  and  637  are illustrated schematically in  FIGS. 40A-B ,  41 A-B and  42 A-B. In the modifications of the second exemplary embodiment which correspond to  FIGS. 40A-B ,  41 A-B and  42 A-B, the additional light providing devices  437 ,  537  and/or  637  can be provided in any desired combination in addition to at least one of the light providing devices  36 ,  136 ,  336   a  and/or  336   b  in order to supplement the lighting effects achieved.  FIGS. 40A-B ,  41 A-B and  42 A-B thus illustrate lighting arrangements  401 ,  501  and  601 , respectively, in accordance with the corresponding modifications of the second exemplary embodiment. 
     The additional light providing device  437  is arranged in the interior  5  and is magnetically coupled to the housing component  104  in order to hold the additional light providing device  437  at the channel  3 , analogously to the magnetic coupling described further above for the light providing devices  36  and  136 . For supplying current to the additional light providing device  437 , the latter likewise, like each of the light providing devices  36 ,  136 ,  336   a - b , is electrically coupleable to one of the two busbars  95  via a line  85  and a connection adapter  199  (not illustrated in  FIGS. 40A-B ). 
     The additional light providing device  437  has a linearly elongated, parallelepipedal shape having a longitudinal extent L′, see  FIG. 40B , wherein a width B′ of the additional light providing device  437  in  FIGS. 40A-B  is smaller than the width B of the light exit region  31 , see also  FIG. 20 . The additional light providing device  437  can thus be positioned laterally with respect to the center of the light exit region  31  or, as shown by a dash-dotted line in  FIG. 40A , centrally in relation to the width direction of the light exit region  31 . The additional light providing device  437  is flush with the plate elements  9  of the ceiling  10  on the visible side S and emits light L directionally into the space. Alternatively, the width B′ could substantially correspond to the width B, as a result of which the additional light providing device  437  then substantially fills the light exit region  31  over the longitudinal extent L′. 
     The additional light providing device  537  in  FIGS. 41A-B  is configured to irradiate a wall, and is thus embodied as a “wall washer”. For this purpose, the additional light providing device  537  in the state coupled to the channel  3 , as shown in  FIGS. 41A-B , projects outward from the interior  5  through the light exit region  31 ; consequently, in this state, only the upper section of the additional light providing device  537  is received in the interior  5 .  FIG. 41A  shows that the additional light providing device  537  emits light L outside the interior  5  directionally laterally in the direction of a wall. The additional light providing device  537  is magnetically coupleable to the channel  3  in the same way as the additional light providing device  437  and likewise, like the light providing devices  36 ,  136 , is supplied with current via a line  85  and a connection adapter  199 . 
     The additional light providing device  537  also has a linearly elongated, parallelepipedal shape having a longitudinal extent L′. A width B′ of the additional light providing device  537  can once again correspond to the width B of the light exit region  31 , wherein the additional light providing device  537  then substantially fills the light exit region  31 , or can be smaller than the width B, see  FIG. 41A . 
     The additional light providing device  637  in  FIGS. 42A-B  is equipped with an opalescent light emission region  638 , which is situated outside the interior  5  in the state in which the additional light providing device  637  is coupled to the channel  3 , as illustrated in  FIGS. 42A-B . Consequently, the additional light providing device  637  in the state in  FIGS. 42A-B  also projects from the interior  5  through the light exit region  31 . The opalescent light exit region  638  supplements the light effects made possible by the light providing devices  36 ,  136 , for example, in an aesthetic way by an element that is luminous uniformly in the ceiling region. The additional light providing device  637  is likewise magnetically coupleable to the channel  3  in the same way as the additional light providing device  437 , and the electric current supply is effected via a line  85  and a connection adapter  199  as in the case of the light providing devices  36 ,  136 . 
     The additional light providing device  637  likewise has a linearly elongated, parallelepipedal shape having a longitudinal extent L′, wherein in  FIGS. 42A-B  a width B′ of the additional light providing device  637  corresponds to the width B of the light exit region  31  and the latter is thus substantially filled in the width direction by the additional light providing device  637 . However, widths B′ smaller than the width B are also conceivable. 
     The additional light providing devices  437 ,  537  and  637  are controlled and/or switched, as described further above for the light providing devices  36  and  136 , for example wirelessly with the aid of the ZigBee specification. 
     It goes without saying that the modifications in accordance with  FIGS. 39A-B ,  40 A-B,  41 A-B and  42 A-B are analogously also applicable to the first exemplary embodiment. 
     Lighting arrangements  301 ,  401 ,  501  or  601  can be constructed analogously to the above explanations concerning the lighting arrangements  1 ,  101 , wherein the construction kit respectively provided then alternatively or additionally contains the light providing device  336   a  and/or  336   b  and/or additionally contains one or a plurality of the additional light providing devices  437 ,  537 ,  637 . The additional light providing devices  437 ,  537  and  637  can in each case likewise be introduced after completion of the channel  3  from the visible side S through the light exit region  31 , wherein in these cases, too, for accurate positioning, the respective additional light providing device  437 ,  537 ,  637  can be moved slidingly at the channel  3 , in particular also along the longitudinal direction  3   a.    
     It should be noted that, in all the exemplary embodiments described above, each of the light providing devices  36 ,  136  can be designed in accordance with  FIGS. 7-15  or  FIGS. 26-29  and may comprise one or a plurality of LEDs as light sources. It is conceivable, however, for the light providing devices  36 ,  136  to generate light in a different way, wherein arbitrary illuminants can be used. Incandescent lamps and/or halogen lamps and/or other suitable illuminants or light sources could be provided, for instance, instead of LEDs. The light providing devices  336   a ,  336   b  and also the additional light providing devices  437 ,  537 ,  637  can also comprise in each case one or a plurality of LEDs as light sources, or can comprise incandescent lamps and/or halogen lamps and/or other suitable illuminants or light sources. 
     Although the present invention has been fully described above on the basis of exemplary embodiments, it is not restricted thereto, but rather is modifiable in diverse ways. 
     By way of example, the invention is not restricted to lighting arrangements in which the light exit region and/or the channel extend(s) rectilinearly or piecewise rectilinearly. In variants of the invention, the channel and/or the light exit region can extend in a curved fashion and/or be branched at least in sections in the longitudinal direction of the channel and/or of the light exit region. 
     By way of example, the shape of the profiled components  6  and the shape of the basic area of the housing component  4  or  104  could accordingly be curved and/or branched, in each case as necessary. Therefore, in variants, the housing component  4  or  104  could be embodied with wall surfaces curved in sections, for example. In a case in which the housing component  4  or  104  has curved wall sections, for simple coupling of the light providing devices to the channel, at least one planar inner surface region  5   e  can be provided at the cover of the housing component  4 ,  104 .