Abstract:
A luminaire arrangement for providing lighting in or near buildings. The luminaire arrangement may contain one or more of the following components: (i) at least one portable luminaire, which has a body and a lamp arrangement, (ii) at least one energy store, which is connected to the luminaire, is rechargeable, and is designed to supply electrical power to the lamp arrangement of the luminaire; and (iii) at least one charging device, which is designed to recharge the energy store. The energy store is attachable by means of an interface arrangement to the charging device in order to at least one of recharge the energy store and supply power to the lamp arrangement. The energy store is separable from the charging device in order to take the luminaire as necessary to any target location to be lit.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application claims the priority of German utility model application DE 20 2016 101 368.2, filed Mar. 11, 2016, wherein the entire content of this application is incorporated herein by reference. 
       BACKGROUND 
       [0002]    The above-mentioned invention relates to a luminaire arrangement, in particular for providing lighting in or near buildings, the luminaire arrangement having a luminaire which includes a body and a lamp arrangement. 
         [0003]    The lamp arrangement preferably includes one or more lamps having a low power consumption, such as an LED lamp arrangement. The lamp arrangement can be constructed in particular in the form of an array of lamps of this type. The luminaire also includes a body, to which the lamp arrangement is fixed. 
         [0004]    Luminaire arrangements of this type are known as wall, table, ceiling or floor luminaires, to name a few examples. The lamp arrangement is generally electrically operated. Here, it is known to connect the lamp arrangement to a main power supply or another power source. For this purpose, suitable electrical lines can be laid in the body. However, it is also known to operate lamp arrangements of this type using rechargeable, secondary batteries or using primary batteries. 
       SUMMARY 
       [0005]    On this basis, an object of the design is to specify an improved luminaire arrangement, an improved luminaire, an improved charging device, and also an improved method for operating a luminaire arrangement of this type. 
         [0006]    The above problem is achieved by a luminaire arrangement, in particular for lighting in or near buildings, the luminaire arrangement containing one or more of the following components:
       at least one portable luminaire, which has a body and a lamp arrangement,   at least one energy store, which is connected to the luminaire, is rechargeable, and is designed to supply electrical power to the lamp arrangement of the luminaire, and   at least one charging device, which is designed to recharge the energy store,       
 
         [0010]    wherein the energy store being attachable by means of an interface arrangement to the charging device in order to recharge the energy store and/or in order to supply power to the lamp arrangement, and being separable from the charging device in order to take the luminaire as necessary to any target location to be lit. 
         [0011]    With the luminaire arrangement according to the present design, a completely new type of lighting concept is provided. The basic concept lies in designing a luminaire so as to be portable and either attaching the luminaire to a charging device in order to recharge an energy store connected to the luminaire, or separating the luminaire from the charging device in order to take the luminaire as necessary to any location to be lit. 
         [0012]    Consequently, by means of the portable luminaire, lighting can be provided in a mobile manner wherever it is currently required, for example for reading, for playing, for doing handicrafts, for activities performed by craftsmen, etc. 
         [0013]    The portable luminaire here can be, in particular, a freestanding luminaire, but also a wall luminaire, a table luminaire, or a ceiling luminaire, to name a few examples. At the location to be lit, the portable luminaire can assume a normal operational position or operating position, which for example is a standing position, a leaning position, a plugged-in position or a hanging position. The charging process can be performed in the normal operational position. In a variant, however, it is preferably for the portable luminaire to be removed from the normal operational position in order to carry out a charging process. The normal operational position is preferably a position in which there is no main power supply connection provided by means of which the portable luminaire could be supplied with power. 
         [0014]    The portable luminaire can be arranged in an indoors space for charging and can be taken outside to light a location, for example in a garden. 
         [0015]    The lamp arrangement preferably has a power consumption that is less than 15 watts, in particular less than 10 watts. The lamp arrangement is preferably also designed to generate a luminous flux in a range of from 200 Im to 2,000 Im. 
         [0016]    The rechargeable energy store preferably has a capacity in a range of from 2,000 mAh to 20,000 mAh. 
         [0017]    The charging device can preferably be attached to a main power supply, such as a 220-volt grid, but can also be connected to a photovoltaic arrangement as power source. 
         [0018]    The portable luminaire preferably has a weight in a range of from 500 g to 8,000 g, in particular in a range of from 1,000 g to 5,000 g. The luminaire also preferably has dimensions similar to conventional furniture luminaires. 
         [0019]    The luminaire, in one embodiment, has dimensions such that it cannot be placed in a pocket of an item of clothing. 
         [0020]    The body of the portable luminaire can be a housing of which the walls can be at least partially permeable to light. The body can be a one-piece rigid body, but can also be a multi-part body. In particular, the body can include a foot, which is connected to a main body, such as an arm or the like. The body can also have a head, which for example is connected to an arm or a pillar. It is particularly preferred if an arm or a pillar of a freestanding luminaire is rigidly connected to a foot, wherein a head can be mounted in an articulated manner on the arm or the pillar, the lamp arrangement being fixed to the head. 
         [0021]    An interface of the interface arrangement is preferably also provided on the body. The interface on the body can be a standard interface, in particular a standard computer interface, such as a USB interface, a mini USB interface, or the like. Standard interfaces of this type generally include at least two DC contacts for providing a DC voltage, which can be used, preferably directly, to charge an electrical energy store inside the body, for example a voltage in a range of from 4 volts to 24 volts, i.e. a voltage as is also used for example to charge rechargeable batteries for mobile telephones. 
         [0022]    The rechargeable electrical energy store of the luminaire arrangement preferably provides a DC voltage in a similar value range, this DC voltage being converted, where appropriate, by means of a converter circuit provided in the body to a voltage that is suitable for LED lamps, i.e. in particular a voltage of 12 volts or a voltage of 24 volts. In some embodiments the energy store can also provide a voltage of this type on the output side as standard. 
         [0023]    A switching arrangement is preferably also provided on the body, by means of which switching arrangement the lamp arrangement can be switched on and switched off. The switching arrangement preferably includes a dimming device so as to be able to adjust the power consumption as necessary. The switching arrangement can include a contactless switch with or without dimmer. 
         [0024]    The luminaire arrangement can include an individual portable luminaire, but can also include a plurality of portable luminaires. 
         [0025]    The above object is also achieved by a method for operating a luminaire arrangement which comprises a portable luminaire having a lamp arrangement, an energy store, and a charging device, which can be connected to the energy store in order to charge the energy store, in particular in order to operate a luminaire arrangement of the type according to the present design, said method having the following steps: recharging the energy store by means of the charging device whilst the charging device is coupled to the energy store; detecting whether the energy store is coupled to the charging device; and, if the energy store is decoupled from the charging device, controlling the luminaire in such a way that power is supplied to the lamp arrangement. 
         [0026]    In the present method according to the invention it is consequently detected whether the portable luminaire is connected to the charging device. As soon as the luminaire is decoupled from the charging device, power is supplied to the lamp arrangement so that the lamp arrangement can be used for lighting. Consequently, the luminaire can light up already on the way to a location to be lit and consequently can light the way for the person carrying the luminaire, for example. 
         [0027]    The luminaire is switched on here preferably automatically once decoupled from the charging device, such that it is not necessary to actuate a switch of a switching arrangement or the like in order to switch on the luminaire. 
         [0028]    The lamp arrangement is preferably switched off when the luminaire is coupled again to the charging device. On the other hand, it is preferable during a charging process if it is possible, during such a charging process (or when such a charging process is complete, but the luminaire is still connected to the charging device), to switch the luminaire on or off by means of a switching arrangement. 
         [0029]    It is also conceivable for the luminaire to always be supplied with a small amount of power during a charging process so as to thus indicate that a charging process is underway. Only when the energy store is fully recharged can the power supply to the lamp arrangement be interrupted in this case. However, it is generally possible to also separate the luminaire from the power supply already prior to complete recharging. In an alternative embodiment it is possible to integrate a charge indicator in the body of the luminaire, for example on the upper side of a foot of the luminaire body, and/or on a head of the body. 
         [0030]    If a state of charge indicator of this type is integrated, the following functions can also be provided in addition: By way of example, the state of charge or state of recharge indicator can be activated for a predetermined period of time (for example ranging from 2 seconds to 30 seconds) as soon as a user switches on the luminaire. The state of charge can thus be displayed to the user directly. Furthermore, provision can be made for the state of charge indicator to appear whenever the energy store is connected to the charging device, such that the state of charge indicator is activated during the entire charging process. The state of charge indicator can include, for example, a plurality of individual light-emitting diodes of different colors, which indicate the particular state of charge, more specifically preferably at least three LEDs for displaying a full energy store, a practically discharged energy store, and an energy store which is still sufficiently charged. 
         [0031]    The above object is also achieved by a method for operating a luminaire arrangement which comprises a portable luminaire having a lamp arrangement, an energy store, and a charging device, which can be coupled to the energy store in order to charge the energy store, in particular a luminaire arrangement of the type according to the present design, said method having the following steps: detecting the state of charge of the energy store and reducing the light output of the lamp arrangement when the state of charge falls below a predetermined threshold value (for example 15% to 40% of a full charge), such that a power-saving mode is established; and/or detecting the state of charge of the energy store and gradually reducing the light output when the state of charge falls below a predetermined threshold value (for example 5% to 15% of a full charge), such that the nearing end of the energy store charge is displayed to a user; and/or providing a boost mode, by means of which the amount of light can be temporarily increased to approximately 101% to 150%, in particular 120% to 150% of a nominal power, the boost mode being automatically limited to a predetermined operating period, which is preferably shorter than 8 minutes. 
         [0032]    With the luminaire according to the present design it is possible to provide a charging interface on the body for charging another mobile device, for example a smartphone or another USB device. A capacity of the energy store of the luminaire can thus be used to recharge another electronic device. If the state of charge falls below a specific threshold value, this function can preferably be switched off for reasons of self-protection of the energy store. 
         [0033]    On the whole, a new type of luminaire concept is consequently provided, with which it is possible, as necessary, to grasp a luminaire which is provided in the region of a charging device and which is generally fully recharged, to separate said luminaire from the charging device, and then to carry it to any location at which lighting is desired. On the one hand this allows an unlimited flexibility with regard to providing lighting at a wide range of different locations. On the other hand a lighting plan can be designed from the outset such that power outlets for luminaires do not have to be provided everywhere. In addition, it can still be possible to provide lighting in spaces or at places where there are no power outlets provided. 
         [0034]    In the case of the above-described electrical parameters of capacity for the energy store and energy consumption of the lamp arrangement, it is possible to provide sufficient lighting for a wide range of different activities for a number of hours without recharging. The lighting period at full light output lies preferably in a range of from half an hour to a week, in particular in a range of from two hours to ten hours. The energy store is preferably based on available secondary battery technologies, such as lithium-ion secondary batteries or the like. A portable luminaire can use for example one or more secondary batteries, as are also used in modern mobile telephones or the like. In a variant the energy store is fixedly integrated in the body of the luminaire. In an alternative preferred embodiment a compartment which is to be opened by a user is provided, within which compartment the energy store(s) is/are received, such that a user can exchange the energy store independently. The energy store can be an LiPO secondary battery for example, which is preferably provided with a protection circuit and housing. The compartment for receiving the energy store can preferably be provided on the underside of a foot of the luminaire. 
         [0035]    By way of example, a USB socket or USB micro socket can be formed on the body of the luminaire and is connected to the energy store in order to recharge this. Alternatively or additionally, a charging station can be provided, which includes an adapter from USB or mini USB to a magnetic contact arrangement. Such a charging station can include, for example, a USB socket or a mini USB socket, into which a conventional USB cable or mini USB cable is inserted, for example on a charging device housing, which can form such a charging station. The magnetic contact can produce, for example, an independent connection to corresponding contacts on a foot of the luminaire when the charging station approaches the luminaire foot (or vice versa). The magnetic connection should be sufficiently strong here for the luminaire to be positioned without separation (within the cable length of the attached USB cable). To release the connection, the user can stand with his/her foot on the projecting end of the charging station in order to fix this on the floor whilst he/she releases the luminaire from the magnetic coupling. 
         [0036]    The above object is also achieved by various types of luminaires which can be used for the above-described luminaire arrangement. 
         [0037]    The object stated in the introduction is achieved in full overall. 
         [0038]    It is generally conceivable to provide the interface arrangement between the energy store and the charging device as a conventional electrical plug connection. 
         [0039]    However, it is particularly preferred when the charging device and the energy store can be coupled by means of an inductive interface arrangement such that the energy store can be charged inductively. 
         [0040]    In this embodiment the charging device and energy store or luminaire can be coupled and decoupled without the need to establish or release mechanical plug connections. 
         [0041]    By way of example, an inductive charging station can be formed as a flat module, which is arranged on a flooring surface. A flat inductive charging device of this type can also be integrated for example in a flooring surface, for example instead of a tile or the like, or can be arranged beneath a non-conductive flooring surface, such as a wood flooring surface or the like. 
         [0042]    Here, it is particularly preferred when the inductive charging device has a coil which is flat and which is oriented, within a charging device housing, substantially parallel to a horizontal. Accordingly, a corresponding inductive charging coil can be arranged on the body of the luminaire, for example in the region of a foot or the like, which charging coil is preferably likewise oriented horizontally in a charging position of the luminaire. 
         [0043]    In accordance with a further embodiment the interface arrangement alternatively or additionally includes an electrical connection arrangement, the connection arrangement being held magnetically in a connection position, such that a separation of the connection arrangement is facilitated. 
         [0044]    In this embodiment the electrical connection between charging device and luminaire can be provided such that the electrical contact is made by magnetically attracting the interface elements of the charging device on the one hand and luminaire on the other hand. If the luminaire and the charging device are forcibly separated from one another, this occurs in a facilitated manner by overcoming the magnetic force of attraction. Damage in the region of the interface arrangement on account of such a forcible separation, as could occur for example in the case of mechanical plug connections, is avoided as a result. 
         [0045]    In accordance with a further preferred embodiment the luminaire arrangement includes a plurality of portable luminaires, which each have a control arrangement, each control arrangement including a wireless communications device, the communications devices of at least two luminaires being able to communicate with one another such that the luminaires can be switched jointly. 
         [0046]    In other words, in this embodiment a plurality of luminaires of this type can be switched synchronously with one another. The term “switch” is to include in the present case in particular a switching on and off, but can also include dimming. 
         [0047]    Here, it can be advantageous if, with operation of just one of the luminaires, the other luminaires are then switched synchronously hereto. Alternatively, is also conceivable to switch a plurality of luminaires by means of a control arrangement, such as a remote control, a mobile telephone, a tablet computer, or the like. Here, it is conceivable for a connection to be established between a control arrangement of this type and one of the portable luminaires so as to then synchronously switch a plurality of luminaires. 
         [0048]    The wireless communications device can be an infrared network or a radio network. The transmission standard can be, for example, an LAN standard, a Bluetooth standard, Zigbee, NFC, or the like. 
         [0049]    When a luminaire has a body with a foot, on which luminaire contacts of an interface arrangement for charging an integrated energy store are provided, luminaire contacts of this type can be provided on one side in such a way that a connection axis of an electrical connection arrangement has a connection axis which is oriented parallel to a horizontal, in particular parallel to a supporting plane. The supporting plane can be a plane parallel to a floor in the case of a freestanding luminaire or a plane parallel to a wall in the case of a wall luminaire. The supporting plane is preferably a plane which is formed parallel to a base area of a foot of a freestanding luminaire. 
         [0050]    It is particularly preferred when the body of the luminaire defines a supporting plane of this type and when the interface arrangement has an electrical connection arrangement with a connection axis which is oriented transversely to the supporting plane. 
         [0051]    In the case of a foot of a freestanding luminaire, the connection axis consequently is not oriented horizontally, but transversely hereto, in particular perpendicularly hereto. 
         [0052]    Here, the connection axis is preferably the axis along which contacts of the electrical connection arrangement of the charging device on the one hand and the body of the luminaire on the other hand are moved toward one another or are aligned with one another. 
         [0053]    The embodiment of an electrical connection arrangement with a connection axis which is oriented transversely to the supporting plane makes it possible, when the luminaire contacts are formed on a foot of a freestanding luminaire, for the connection axis to extend perpendicularly. Here, the luminaire can be moved substantially transversely to the horizontal in order to release the electrical connection arrangement. This can be combined with an embodiment as described hereinafter in which a charging device has a housing which has, on its upper side, a foot placement surface and of which the charging interface is likewise formed on the upper side, so as to in this way provide a substantially perpendicular connection axis. 
         [0054]    In accordance with a preferred embodiment the body here of the luminaire has a recess, in which at least a portion of a charging device housing can be inserted, the shape of the recess and the shape of the charging device housing being coordinated with one another such that the charging device housing can be pivoted relative to the body of the luminaire parallel to the supporting plane by an angle which lies in a range of from 10° to 90°. 
         [0055]    The angle preferably lies in a range of from 15° to 45°, in particular from 20° to 35°. 
         [0056]    Here, the pivot potential can be provided in particular about the above-mentioned connection axis. 
         [0057]    This has advantages in particular with regard to the process of coupling the body of the luminaire to the charging device housing. Here, the charging device housing can rest on a flooring surface, for example. Due to the relatively large pivot angle, it is possible to move the body of the luminaire toward the charging device housing at different angular positions in order to perform the coupling process. 
         [0058]    The recess on the body preferably has an insertion bevel which defines the above-mentioned angle. 
         [0059]    In this embodiment it is also advantageous when the interface arrangement includes a magnetic holding device or coupling device, such that the electrical connection arrangement is electrically coupled substantially automatically as soon as the body approaches the charging device housing. 
         [0060]    The recess is formed here preferably on an underside of a foot of the body of the luminaire in such a way that the luminaire can be brought not only from the side toward the charging device housing in order to carry out the coupling process. Rather, it is also possible to place the foot from above onto the charging device housing, the coupling process being implemented again preferably via magnetic coupling means, by means of which charging contacts on the charging arrangement housing and luminaire contacts on the body are electrically contacted with one another. 
         [0061]    This magnetic connection is preferably sufficiently strong here, as mentioned above, for the luminaire to be positioned without separation, unless the user places a foot on the charging device housing or the user removes the luminaire, beyond the cable length of an attached cable, from a main plug to which the charging device is connected. In this case the magnetic coupling or magnetic connection is forcibly released, however this can be implemented without damaging the interface arrangement. 
         [0062]    It may also be preferable if the recess has a recess cone, which is preferably oriented concentrically to the connection axis. In this case it is likewise preferred if a housing cone is provided on the charging device housing, which housing cone is likewise oriented concentrically to the connection axis. In other words, the cones of the recess on the one hand and charging device housing on the other hand are arranged concentrically to a particular electrical contact arrangement. 
         [0063]    Consequently, it is preferred when the electrical connection arrangement has two concentric luminaire contacts on the body of the luminaire and two corresponding concentric charging contacts on the charging device housing. 
         [0064]    The charging contacts are preferably provided on an upper side of the charging device housing. The luminaire contacts are also preferably provided on an upper side or ceiling of the recess, which is preferably open to the underside. 
         [0065]    The present design also relates to a luminaire of a luminaire arrangement which is to be protected independently of the charging device. Here, the luminaire preferably has a handle, which is mounted and/or formed on the luminaire such that the luminaire, when grasped, assumes an equilibrium position which deviates from a normal operational position by no more than ±30°. 
         [0066]    The handle is preferably shaped such that it can be grasped by hand. The term “grasped” in the present case is intended to mean that, for example, a finger is held centrally beneath the handle, such that the luminaire can freely come to a rest with respect to this suspended position. Compared with a normal operational position, in which the luminaire is placed for example on a floor, an equilibrium position is provided here which deviates from the normal operational position by no more than ±30°. Superior ergonomics and a high level of safety when carrying the luminaire can be achieved as a result. 
         [0067]    As already mentioned, the handle is preferably a handgrip having a length in the range of from 5 cm to 20 cm and a diameter in the range of from 1 cm to 7 cm. In the case of a normal operational position of the luminaire, the handle extends preferably approximately in the horizontal direction, but can also be oriented perpendicularly hereto. 
         [0068]    In any case a center of gravity of the handle is preferably oriented vertically with a center of gravity of the luminaire and/or a center of gravity of a foot of the luminaire, in such a way that the center of gravity of the handle in a vertical projection is distanced by no more than 10 cm, in particular by no more than 5 cm, from the center of gravity of the luminaire or the foot. 
         [0069]    A further embodiment of such a luminaire, which is to be protected independently, includes a foot from which a pillar-like main body extends upwardly, a luminaire head being mounted on the main body, and a handle for carrying the luminaire being mounted on the main body. 
         [0070]    In the case of this luminaire the pillar-like main body is preferably rigidly connected to the foot. The handle is preferably oriented horizontally and/or extends transversely to a longitudinal axis of the pillar-like main body. In particular, is preferred if a handle extends in the manner of a cantilever from the pillar-like main body, in such a way that the handle can be grasped for example from above in order to carry the luminaire. 
         [0071]    It is particularly preferred if the main body has a longitudinal axis which is oriented at an angle in the range between 45° and 80° with respect to a horizontal. 
         [0072]    Here, the main body is preferably connected to a foot in the region of a horizontal end of the foot and is inclined such that it extends over the foot. The handle preferably extends in a projection plane defined in this way and/or extends from the main body on a rear side of the main body averted from the foot. The handle is preferably arranged, in vertical projection, within a peripheral line of the foot. 
         [0073]    In all embodiments in which the luminaire has a foot, the electrical energy store is preferably integrated therein. A recess is also preferably provided on the foot, as has been described above in a preferred embodiment, and serves to receive at least a portion of a charging device housing. 
         [0074]    A further embodiment of such a luminaire, which is to be protected independently, has a control arrangement arranged on the body, said control arrangement having a switching arrangement which comprises a first switching device for switching the lamp arrangement and a second switching device, the first switching device preferably being contactless and/or dimmable, and/or the second switching device preferably being connected in series with the first switching device and/or being capacitive. 
         [0075]    The lamp arrangement can preferably be switched in this embodiment via two control devices. The second control device is preferably closed during operation. By way of example, the second switching device can be closed when the luminaire is decoupled from a charging device. 
         [0076]    The second switching device is preferably connected in series with the first switching device, the first switching device preferably being able to be switched and/or dimmed contactlessly. For this purpose, a contactless sensor such as a reflex light barrier is used, which for example can receive light reflected back from an operating member (for example a finger). The contactless sensor is preferably a contactless IR sensor, which for example can receive reflected-back IR light. 
         [0077]    A reflex light barrier of this type is supplied here continuously with power during operation in order to emit a light beam and detect any reflections hereof. Although the consumption is very low, it is still preferred in the case of a portable luminaire separable from a charging device if this type of power consumption is not permanent. Consequently, it is preferred when the second switching device, which is preferably connected in series with the first switching device, opens once a predetermined period of time has elapsed, for example after a period of time ranging from one minute to ten minutes. A renewed closing of the second switching device is then only possible for example via a mechanical switch which operates the second switching device. However, it is particularly preferred when the second switching device is capacitive, in such a way that a housing or body of the luminaire for example must be contacted in order to close the second switching device again following a sleep mode of this type and in order to consequently wake the luminaire from the sleep mode. The first switching device can then be activated again, a light beam of a reflex light barrier being emitted. 
         [0078]    A capacitive design of the second switching device generally means that a body of the luminaire is electrically conductive at least in a region to be contacted, or that an electrically conductive capacitive sensor portion is formed behind a housing portion, similarly to a hob that is to be capacitively operated. 
         [0079]    In accordance with a further embodiment of such a luminaire, which is to be protected independently, the lamp arrangement and the energy store are fixed to the body, the body being provided with holding or supporting means in order to temporarily hold or support the body at the location to be lit. 
         [0080]    The holding means can be mechanical holding or supporting means, for example a hook for hanging the luminaire. However, in the simplest case, the holding means could also be a foot by means of which the luminaire can be set down on a floor. 
         [0081]    It is particularly preferred when the holding means are formed as magnetic holding means. In this case it is possible for example to hold the luminaire magnetically at a location to be lit. The magnetic holding means can consist of the fact that the luminaire has a ferromagnetic portion which can be magnetized. Alternatively, the luminaire can have a magnet by means of which the luminaire can be temporarily fixed to another magnet or to a ferromagnetic material. 
         [0082]    By way of example, a magnetic counter piece can be secured to a wall in order to secure a luminaire to a wall in a simple manner, even if there is no main outlet provided there. 
         [0083]    A fastening to a ceiling is also possible via such magnetic holding means. 
         [0084]    The magnetic holding means can be standardized for different luminaires. In particular, it is possible to provide a holding magnet arrangement on the body, which arrangement has a centering feature, such as a circular protrusion. The magnetic holding means can also comprise a counter piece having a centering recess, which is substantially circular. Here, the counter piece can be secured for example to a wall, but can also be secured to a ceiling or to an end of a suspension. The counter piece is preferably produced at least in part from a ferromagnetic material, such that the counter piece can be produced comparatively economically. 
         [0085]    In an alternative embodiment the counter piece can include a magnet, with corresponding ferromagnetic portions of the magnetic holding means being provided on the body of the luminaire. Luminaires having magnetic holding means of this type preferably do not have a magnetic charging interface, and vice versa. 
         [0086]    As described above, a luminaire according to the present design can be formed as a freestanding luminaire, as a wall luminaire, or as a hanging or pendant luminaire. A design as a ceiling luminaire is also possible. 
         [0087]    In a particularly preferred variant the luminaire can have a body which has a foot and a head connected thereto via a rotational joint. The lamp arrangement can be formed on the head. The lamp arrangement can be connected via a cable in the rotational joint to an energy store in the foot. By way of example, the energy store can be a lithium-ion secondary battery, as is also used in mobile radio devices. An on/off switch can be integrated in the foot, in particular on the underside thereof. It is also preferred if magnetic holding means, in particular one or more magnets, are integrated in the foot. In this case, it is preferred when an underside of the foot is produced from a plastics material. It is particularly preferred if the foot has an upper shell and a lower shell, the upper shell preferably being produced from metal, in particular an aluminum alloy, and the lower shell preferably being produced from plastic. In this case the effect of the magnets is improved if a luminaire of this type is secured to a magnetic counter means, for example to a ferromagnetic portion, such as a refrigerator door, a metal plate, a vehicle body, etc. 
         [0088]    In the variant in which a foot and a body are connected via a rotational joint, a charging interface in the form of a standard interface or computer interface can be formed, such as a USB interface. A luminaire of this type is particularly portable and can be charged at any location. The same is also true for luminaires which are formed for example as wall luminaires, as ceiling luminaires, or as pendent luminaires. 
         [0089]    In accordance with a further embodiment of a luminaire, which is to be protected independently, the luminaire includes a body to which the lamp arrangement and the energy store are fixed and which defines a supporting plane, which for example can be a resting plane of a foot, the interface arrangement comprising an electrical connection arrangement having a connection axis formed transversely to the supporting plane. 
         [0090]    As explained above, a luminaire of this type is preferably formed as a freestanding luminaire, in which the luminaire contacts of the electrical connection arrangement are formed in a recess in the foot, which is open on a side of the foot and on an underside of the foot, as described above. 
         [0091]    A further embodiment of a luminaire, which is to be protected independently, includes a body which defines a body plane and in which a rechargeable electrical energy store is received, the luminaire also including a lamp arrangement which has a light input portion and a luminous panel with a side edge, into which light from the light input portion is coupled, the luminous panel being oriented at an angle of greater than 3° and less than/equal to 90° to the body plane. 
         [0092]    In this embodiment the light input portion can be formed for example by a light strip having a plurality of adjacently arranged LEDs, the light strip being arranged in the region of an interface between the body and the luminous panel. 
         [0093]    A luminaire of this type is suitable for example as a wall or ceiling luminaire, the body then preferably being mounted parallel to the wall or ceiling, and the body plane thus simultaneously forming a supporting plane of the above-described type. 
         [0094]    In this case the luminous panel protrudes relative to the wall or ceiling and consequently can be used advantageously for lighting. 
         [0095]    The luminous panel is preferably opaque or has scattering elements, such that light is coupled out from at least one surface of the luminous panel, said surface being oriented perpendicularly to the side edge, in particular from two opposite surfaces. On account of the angled embodiment of the luminous panel, light can be irradiated both directly, for example downwardly, and indirectly upwardly. 
         [0096]    A luminaire of this type is also suitable as a pendant luminaire. 
         [0097]    Magnetic holding means are preferably also formed on the body in order to secure the body temporarily to a wall, to a ceiling or also to a pendant. 
         [0098]    An interface for charging the energy store is preferably provided on the body. The interface is preferably a standard interface, in particular in the form of a standardized computer interface, such as a USB interface. 
         [0099]    The present design also relates to a charging device for a luminaire arrangement of the type disclosed herein and/or for a luminaire of the type disclosed herein, the charging device having a flat charging device housing, which has an underside, which can be placed on a floor, an upper side, and a side face connecting the underside and the upper side, a holding surface, for example in the form of a foot placement surface, being formed on the upper side, and/or a charging interface for connection to a rechargeable energy store being arranged on the upper side and/or on the side face. 
         [0100]    In this embodiment the housing can be fixed by way of example by means of a foot or a hand, and the luminaire can then be separated from the interface at the side face of the charging device housing. Here, is particularly preferred when the coupling between charging device and luminaire has magnetic means, which facilitates a separation of the interface or the connection. 
         [0101]    The flat housing of the charging device can include here charging electronics, such that the housing is connected to a main plug. Here, by way of example, the charging electronics can convert a main voltage of 220 volts into a suitable charging voltage or a charging current in the form of a direct current. 
         [0102]    In a particularly preferred variant, however, charging electronics are provided in a separate housing, which for example can be part of a charging plug which can be plugged into a power outlet. A cable connected to a charging plug of this type, via which cable the charging DC voltage or the charging direct current is already provided, can then be a USB cable or a mini USB cable for example, as is known in the case of smart phones and other devices of this type. The flat housing of the charging device can in this case include a passive adapter which connects a USB connector or a mini USB connector to suitable contacts, which for example cooperate with a magnetic coupling between the housing and the luminaire. In this case, the flat housing preferably does not contain any active electronics, but is formed in the manner of a charging station or a magnet dock and preferably includes merely a socket for the connector of a cable providing a DC voltage, such as a USB cable, and contact means for making electrical contact with the luminaire so as to thus supply power for charging to the energy store in the luminaire. 
         [0103]    Consequently, it is preferred when the charging device is equipped such that a standard interface is formed on the charging device housing, via which standard interface an electrical charging DC voltage can be provided, the electrical standard interface in the charging device housing being electrically connected to charging contacts on the outer side of the charging device housing, in particular on the upper side thereof, the charging contacts being electrically connectable to luminaire contacts on a body of a luminaire. 
         [0104]    For charging, a conventional USB charging device can be used alternatively, for which purpose a USB mini socket or USB micro socket is preferably provided on the body of the luminaire. 
         [0105]    As explained above, a charging device housing in the form of a dock is preferably provided when the luminaire is a freestanding luminaire. In all other cases, it is generally preferred when a standard interface, such as a USB socket, is provided on the body. 
         [0106]    In accordance with a further preferred embodiment, which is to be protected independently, a charging device includes a charging station, to which a plurality of luminaires can be fixed temporarily and which has a plurality of interfaces, corresponding to the plurality of luminaires, for simultaneously charging the luminaires fixed to the charging station. 
         [0107]    The basic concept of a charging device of this type having a charging station consequently lies in the fact that a plurality of luminaires can be charged simultaneously. Here, the charging station preferably has a plurality of luminaire mounts, which are preferably each identical so as to be able to receive identical types of luminaires. Alternatively, however, different luminaire mounts for receiving different types of luminaires can also be provided on the charging station. 
         [0108]    The charging station preferably has a base by means of which the charging station can be placed on a horizontal surface. The charging station also includes a power supply interface, via which charging power can be fed. It is indeed conceivable for a converter for converting a main voltage into a charging DC voltage to be contained in the charging station itself, for example in a base hereof. However, a charging interface which is connected by means of wiring provided in the charging station to the plurality of interfaces for simultaneous charging of a plurality of luminaires is preferably provided on a housing of the charging station, preferably on the base. 
         [0109]    In this case, the central charging interface at the charging station can be either a standard interface, such as a USB port. Alternatively, a recess can be provided on the charging station, into which recess at least a portion of a charging device housing can be inserted, the merits of which have been described above in similar form for the foot of a particular embodiment of a luminaire according to the present design. 
         [0110]    A charging device housing of this type can be identical to that described above, specifically with concentric charging contacts which can be electrically connected to concentric “luminaire” contacts on the charging station. The charging device housing can again be formed such that, on an upper side hereof, a foot placement surface or hand resting surface or the like is formed, such that the charging device housing can be fixedly held by the part protruding from the recess of the charging station in order to separate a magnetic coupling between the charging device housing and the charging station. 
         [0111]    The charging device housing can also have a standard interface in the form of a USB interface or the like, via which the charging device housing can be connected to a standard charging converter. In this case the charging device housing does not have its own converter provided therein, but instead merely electrical wiring between the standard interface and charging contacts. 
         [0112]    The charging device housing can consequently be used to recharge a luminaire which has a foot on the underside of which a recess is provided for receiving a portion of the charging device housing. However, the charging device housing can also be used to charge a plurality of luminaires which are temporarily fixed in a charging station of the above-described type. The charging station is preferably formed such that it has a base, on which at least two, preferably four or more luminaire mounts for a corresponding number of luminaires are provided. The luminaires are preferably luminaires in which a luminous panel extends at an angle from a body. The luminaire mounts can be provided here in order to receive the corresponding bodies of these luminaires. The mounts are preferably arranged here such that in each case two luminaires can be received directly adjacently via their bodies, in such a way that their luminous panels extend in opposite directions. 
         [0113]    It goes without saying that the above-mentioned features and the features yet to be explained hereinafter can be used not only in the specified combinations, but also in other combinations or in isolation without departing from the scope of the present invention. 
     
    
     
       DRAWINGS 
         [0114]    Exemplary embodiments of the invention are illustrated in the drawing and will be explained in greater detail in the following description. In the drawing: 
           [0115]      FIG. 1  shows a schematic illustration of a luminaire arrangement according to the present design; 
           [0116]      FIG. 2  shows schematic illustrations of further luminaire arrangements in a building; 
           [0117]      FIG. 3  shows a further embodiment of a luminaire arrangement according to the present design in a charging position and in a lighting position; 
           [0118]      FIG. 4  shows an illustration comparable to  FIG. 3  of a further embodiment of a luminaire; 
           [0119]      FIG. 5  shows a detailed view of the luminaire of  FIG. 4 ; 
           [0120]      FIG. 6  shows a schematic illustration of a further embodiment of a luminaire arrangement; 
           [0121]      FIG. 7  shows a plan view of a charging device of the luminaire arrangement of  FIG. 6 ; 
           [0122]      FIG. 8  shows a schematic illustration of a control arrangement of a luminaire; 
           [0123]      FIG. 9  shows a perspective illustration of a further embodiment of a luminaire; 
           [0124]      FIG. 10  shows a perspective illustration of the luminaire of  FIG. 9  from below; 
           [0125]      FIG. 11  shows a schematic illustration of an interface arrangement with vertical connection axis for an embodiment of a luminaire arrangement, more specifically obliquely from above; 
           [0126]      FIG. 12  shows an illustration comparable to  FIG. 11  obliquely from below; 
           [0127]      FIG. 13  shows an illustration of the interface arrangement from below prior to a coupling of charging device housing and body; 
           [0128]      FIG. 14  shows an illustration comparable to  FIG. 13  once the coupling has been established; 
           [0129]      FIG. 15  shows a schematic perspective view of a charging device housing in accordance with a further embodiment; 
           [0130]      FIG. 16  shows the charging device housing of  FIG. 15  from above; 
           [0131]      FIG. 17  shows a perspective illustration of a further embodiment of a luminaire obliquely from the front; 
           [0132]      FIG. 18  shows a perspective illustration of the luminaire of  FIG. 17  obliquely from behind; 
           [0133]      FIG. 19  shows an operating device for luminaires; 
           [0134]      FIG. 20  shows a perspective view of a further embodiment of a luminaire in the form of a pendant luminaire; 
           [0135]      FIG. 21  shows a schematic illustration of a magnetic securing part for magnetic holding means from the front; 
           [0136]      FIG. 22  shows the magnetic securing part of  FIG. 21  in a sectional view; 
           [0137]      FIG. 23  shows a schematic illustration of a luminous panel and of a light input for the luminaires shown in  FIGS. 17, 18 and 20 ; 
           [0138]      FIG. 24  shows a luminaire arrangement having a plurality of luminaires and a central operating device; 
           [0139]      FIG. 25  shows a further embodiment of a charging device comprising a charging station for charging a plurality of luminaires. 
       
    
    
     DESCRIPTION 
       [0140]      FIG. 1  schematically illustrates a luminaire arrangement designated generally by  10 . The luminaire arrangement  10  includes a luminaire  12 . The luminaire  12  comprises a lamp arrangement  14 , which is incandescent lamp-based or halogen-based, but in particular is formed as an LED lamp arrangement, in particular in the form of an array formed from a plurality of individual LEDs. 
         [0141]    The luminaire  12  also has a body  16 , which can be formed in one or more parts. The body  16  can be a housing, can be an arrangement formed from a foot, pillar and head, but can also be a light-permeable, opaque or otherwise scattering surface. In some cases the body can be a closed sleeve formed from a light-permeable or light-scattering material. In other variants the body can be a housing not permeable to light, which for example includes a slot or another opening for the exit of light of the lamp arrangement  14 . In many cases the lamp arrangement  14  can include a flat element formed from a light-scattering plastics material which is provided with holes, for example with countersunk points for each LED of an LED array. The rear side of a plastic or glass arrangement of this type can be covered by a housing which covers the rear side of the LED array arrangement and, where applicable, control electronics assigned to this arrangement. 
         [0142]    Examples of luminaires of this type can be found on the webpage www.nimbus-lighting.com, with reference being made to the full content thereof. 
         [0143]    The luminaire  12  also includes a control arrangement  18 , which is designed to control the lamp arrangement  14 . The luminaire  12  also has an electrical energy store  20 , which is fixedly connected to the body  16 , in particular is received in a housing portion of the body. It is particularly preferred when the electrical energy store  20 , which for example can be formed as a secondary battery and consequently can be recharged, is received in a foot of the luminaire  12 . 
         [0144]    The luminaire arrangement  10  also has a charging device  22 , which converts energy from a power source  24 , for example a main power supply  24 , into a suitable DC voltage for charging the electrical energy store  20  and/or for supplying power to the lamp arrangement  14 . 
         [0145]    An interface arrangement  26  serves to connect the charging device  22  to the luminaire  12 . The interface arrangement  26  can include an electrical connection device, for example a mechanical plug connector device. However, the interface arrangement  26  can also be an inductive interface arrangement. The interface arrangement  26  can also be assigned a magnet arrangement  28 , which serves to electrically contact the interface elements of the luminaire  12  and the charging device  22  with one another on the basis of magnetic attraction, such that a release of the interface arrangement  26  or separation of the interface arrangement  26  can be facilitated. 
         [0146]    The control arrangement  18  has a circuit arrangement  30 , which preferably can be operated by means of an operating object  32 , such as a finger. The switching arrangement  30  can be a mechanical switching device, but can also be a capacitive switching device, a contactless switching device with reflex light barrier, or the like. The switching arrangement  30  can be integrated for example in a head of the body  16  of the luminaire  12 . 
         [0147]    The luminaire  12  also includes a supporting or holding portion  34 , by means of which the luminaire  12  can be supported or held at a location to be lit. In the simplest case, the supporting or holding portion  34  can be a foot, by means of which the luminaire  12  is placed on a floor. The supporting/holding portion  34 , however, can also be a magnetic portion, a hook, or the like. 
         [0148]    In some embodiments the control arrangement  18  includes a communications device  36 , by means of which the luminaire  12  can be connected for communication to another luminaire  12  in order to switch the luminaires in a synchronized manner. However, the communications device  36  can also be designed to be connected to an operating device, for example a remote control, a mobile telephone, a tablet computer, etc. The communications device  36  is preferably a wireless communications device, based for example on one of the following standards: WLAN, Bluetooth, Zigbee, NFC, etc. 
         [0149]    Lastly, the luminaire  12  can include a handle  38 , by means of which the luminaire  12  can be carried, more specifically to a location to be lit, the luminaire  12  for this purpose being separated from the charging device  22 , preferably beforehand, in such a way that the luminaire arrangement  14  is supplied with power exclusively from the electrical energy store  20 . 
         [0150]      FIG. 2  illustrates different types of luminaires or luminaire arrangements, more specifically with respect to a building  40 , which includes a floor  42 , a ceiling  44  and at least one vertical wall  46 . 
         [0151]      FIG. 2  thus shows a wall luminaire  12 A having a supporting/holding portion  34 A, by means of which the luminaire  12 A can be connected to an interface arrangement  26 A in a region of the wall  46 , a charging device  22  which is connected to a power source  24 , such as a main power supply, being integratable in the wall. In this case the wall luminaire  12 A can be grasped for example at a vertically extending part of a body and can be separated from the interface arrangement  30  so as to then be placed on a table, for example by means of a foot  48 , so as to be able to carry out a lighting function in the region of the table independently of the main power supply. 
         [0152]    An alternative embodiment of a luminaire  12 B for example has a light-permeable or light-scattering body and also a hook  50 , which forms a supporting or holding portion and for example is connectable to a hook eyelet, which hangs from a ceiling  44 . With a hook  50  of this type, the luminaire  12 B, which in this case is formed as a ceiling luminaire, can also be hung at other locations, for example also in the garden, on a terrace, or the like. Here, a charging device  22  can likewise be provided in the region of the hook eyelet, by means of which charging device an energy store contained in the luminaire  12 B can be charged. 
         [0153]    A further luminaire in the form of a freestanding luminaire is shown at  12 C. The freestanding luminaire  12 C has a foot  48 , from which a rod-shaped or pillar-shaped main body  52  protrudes upwardly. The main body  52  can be oriented at an incline to a horizontal, as is illustrated schematically in  FIG. 2 . A head  54  can be supported at a free end of the main body  52 , more specifically for example via a joint  56 , which can be formed as a single joint or as a multiple joint. A lamp arrangement  14  can in this case be integrated in the head  54 , as is illustrated schematically in  FIG. 2 . 
         [0154]    It can be seen that an interface arrangement  26 C is formed in the region of the foot in order to connect the luminaire  12 C to a charging device  22 , which for example has a flat housing and is set down on the floor  42 . The charging device  22  can be connected via a cable (not illustrated in greater detail) to a power outlet  58  of a power source  24 . 
         [0155]    A ceiling luminaire is shown at  12 D which includes a flat lamp arrangement  14 , on the rear side of which a body  16  is formed. The body  16  can cooperate in this case with a magnet  60 , which is secured to the ceiling  44 . Consequently, following a charging process at a charging station (not illustrated), the ceiling luminaire  12 D can be secured upwardly to the ceiling  44 , more specifically by means of the magnet  60 , which in this case serves as a supporting or holding portion. 
         [0156]    A similar concept is shown for a floor-lighting luminaire  12 E 1 , which can be secured by means of a magnet  60  in a region of a wall  46  close to the floor  42  by means of a magnet  60 . 
         [0157]    In  FIG. 2  a further luminaire  12 E 2 , in addition to the luminaire  12 E 1 , is illustrated on a further wall, the luminaires  12 E 1  and  12 E 2  preferably being of identical construction. The luminaires  12 E 1 ,  12 E 2  can each serve to light a floor, for example in the region of stairs or the like. In a preferred variant the luminaires  12 E 1 ,  12 E 2  can communicate wirelessly with one another via communications devices (not presented in greater detail), as is shown schematically in  FIG. 2  at  62 . The luminaires  12 E 1 ,  12 E 2  can each be switched, for example switched on and off or dimmed, synchronously as a result. 
         [0158]    An operating device is shown at  66  which can be formed as a remote control, as a mobile telephone, as a tablet computer, etc. Communication between the operating device  66  and at least one of the luminaires  12 E 1 ,  12 E 2  is illustrated at  64 . The operating device  66  can also be formed, however, so as to control all luminaires  12 E 1 ,  12 E 2  in parallel and to switch these in parallel. 
         [0159]    The concept of the communication between luminaires is also conceivable for other of the above-described luminaire types, as is shown schematically for example at  62  between the luminaires  12 A and  12 C. The operating device  66  is also designed, as appropriate, to also switch other luminaires, for example the luminaire  12 B, as is also indicated in  FIG. 2  by an arrow  64 . 
         [0160]      FIG. 3  shows a further embodiment of a luminaire  12 F which corresponds in terms of structure and operating principle to the luminaire  12 C of  FIG. 2 . Like elements are therefore characterized by like reference signs. 
         [0161]    The luminaire  12 F includes a body having a pillar-like main body  52 , at the end of which a head  54  is supported via a joint  56 . The joint  56  can be a joint movable about three axes. A switching arrangement  30  is provided on an upper side of the head  54 , by means of which switching arrangement a lamp arrangement  14  arranged on the underside of the head  54  can be switched. 
         [0162]    The foot  48  is formed such that it accommodates the energy store  20 . An inductive charging process can also take place between the foot  48  and a charging device  22  integrated in the floor  42 . For this purpose, the charging device  22 , in the case of a tiled floor, can be integrated in the floor instead of a tile  70 , for example. Joins of tiles  70  of this type are illustrated schematically at  72 . In other words, an upper side of the charging device  22  can be flush with the floor  42  so that the luminaire  12 F can be placed onto the charging device  22  in order to carry out an inductive charging process. For this purpose, the charging device  22  includes a schematically illustrated coil  74 , and a further coil  76  is integrated in the foot  48 . The coils  74 ,  76  cooperate magnetically during the inductive charging process, the merits of which are known per se. It goes without saying that a further part of the control arrangement  18  can preferably also be integrated in the foot  48  in order to conduct energy received via the interface arrangement  26 F to the energy store  20  and/or to the lamp arrangement  14 . 
         [0163]    As it is also illustrated in  FIG. 3  on the left-hand side, the luminaire  12 F has a handle  78 . The handle  78  extends in a cantilever-type manner from the pillar-like main body  52 . The main body  52  is rigidly connected to foot  48  at a lateral end thereof and extends at an angle α to the horizontal, more specifically such that the main body  52  extends in a vertical projection transversely above the foot  48 . The angle α can lie in a range of from 45° to 80°, in particular in a range of from 60° to 80°. The handle  78  is fixed to the main body  52  preferably on a side averted from the foot  48 . The handle  78 , as is illustrated in  FIG. 3 , has a length L G  and a diameter D. The length L G  can lie for example in the range of from 5 cm to 20 cm. The diameter D can lie for example in the range of from 1 cm to 7 cm. 
         [0164]    The handle  78  can be grasped easily from above in order to carry the luminaire. The handle  78  can be fixed in a region of an upper half of the main body  52  and can extend substantially in the horizontal direction. 
         [0165]    An axial center of the handle  78  is preferably arranged above a center of gravity of the luminaire  12 F or of the foot  48 , as is illustrated by a vertical dashed line in  FIG. 3 . If the handle is consequently grasped from below by means of an operating member, such as a finger  32 , the luminaire  12 F assumes an equilibrium position, which deviates from the normal operational position shown on the left in  FIG. 3  by no more than ±30°, preferably by no more than ±15°. 
         [0166]      FIG. 3  also shows that the luminaire can be removed from the location LP of the charging device  22  by means of the handle  78 , more specifically to a location to be lit BP, which is schematically indicated in  FIG. 3  by a sofa  80 , such that the luminaire  12 F can serve as a reading luminaire. An axial length L S  of the main body  52  can lie for example in the range of from 35 cm to 150 cm. 
         [0167]    Although in  FIG. 3  an inductive charging device  22  is shown, it goes without saying that the luminaire  12 F can also be formed such that an electrical interface device is formed on a side of the foot  48 , similarly to that illustrated at  26 C in  FIG. 2 . 
         [0168]      FIG. 4  shows a further luminaire  12 F′, which illustrates a modification of the luminaire shown in  FIG. 3 . The luminaire  12 F′ corresponds generally in terms of structure and operating principle to the luminaire  12 F of  FIG. 3 , and therefore like elements are provided with like reference signs. 
         [0169]    The luminaire  12 F′ has a main body  52  with a shorter length L S ′ than the luminaire  12 F. The length L S ′ can lie for example in a range of from 15 cm to 50 cm. In this case, the handle  78  can be arranged in the region of the free end of the main body  52  averted from the foot  48 . In this case, a position of the handle  78  lying above the center of gravity can lie closer to the main body  52  for example, as is schematically illustrated in  FIG. 4 . 
         [0170]      FIG. 5  shows the luminaire  12 F shown in  FIG. 3  in the region of its head  14 . It can be seen that the head  54  is rectangular in plan view and has a greater extension over both side lengths than over height. The lamp arrangement  14  is provided on the underside of the head  54 . A switching arrangement  30 F can be formed on the upper side of the head  54 , which for example works contactlessly in the manner of a gesture control, the switching arrangement  30 F possibly including a reflex light barrier. 
         [0171]    It can also be seen in  FIG. 5  that the joint  56  is rotatable about three axes which are independent of one another, such that a practically arbitrary adjustment of the head  54  with respect to the main body  52  is possible. 
         [0172]      FIG. 6  shows a further variant of a luminaire  12 F in combination with a charging device  22 . The charging device  22  and the luminaire can be connected to one another via an electrical connection arrangement  82 . The charging device  22  has a housing  83 , which is formed as a flat housing and on which a plug  84  with charging contacts of the electrical connection arrangement  82  is provided. Accordingly, an electrical socket  86  with luminaire contacts is provided on the foot  48  of the luminaire  12 F, in which socket the plug  84  can be inserted in order to couple the luminaire  12 F to the charging device  22 . 
         [0173]    It can be seen that the foot  48  and/or the housing  83  can have a magnet arrangement  28  in order to hold the electrical connection arrangement  82  in electrical contact substantially on the basis of magnetic forces. In this way, the electrical connection arrangement  82  can be easily released, more specifically against the magnetic force of attraction of the magnet arrangement  28 . 
         [0174]    The housing  83  has an upper side  88  and an underside  90 . The underside  90  can be set down on the floor  42 . The plug  84  is formed in the region of a side face  92  connecting the upper side  88  and the underside  90 . 
         [0175]    When the luminaire  12 F is brought into the vicinity of the charging device  22 , a magnetic force of attraction  94  causes the electrical connection arrangement  82  comprising the plug  84  and the socket  86  to be closed. The plug  84  and the socket  86  are illustrated in an exaggerated manner in  FIG. 6 . In both cases the elements may also be much shorter, such that separation at an angle does not cause any mechanical damage either. 
         [0176]    The upper side  88  of the housing  83  is formed as a foot placement surface. Consequently, a foot  96  can be placed thereon in order to fix the position of the charging device  22  by means of a vertical fixing force  98 . The luminaire  12 F can thus be released from the charging device  22  in a simple manner against the force of attraction  94  of the magnet arrangement  28  and can be brought to a location to be lit. 
         [0177]      FIG. 7  shows the charging device  22  from above, with the upper side  88  of the housing  83  and one or more plugs  84  on a side face  92 . 
         [0178]      FIG. 8  shows a control arrangement  18  of a luminaire  12  in a schematic exemplary form. The control arrangement  18  includes a switching arrangement  30 , which can be provided on a body  16 , for example in the region of a head  54 . 
         [0179]    The switching arrangement  30  includes a first switching device  102 . The first switching device  102  includes a contactless sensor  104 , which comprises an emitter  106  for light and a receiver  108 , the contactless sensor  104  possibly being formed as a reflex light barrier. The emitter  106  and the receiver  108  can be formed in a wall region of the body  16  or the head  54  such that the first switching device  102  can be actuated by the approach of an operating member, such as a finger  32 . 
         [0180]    The first switching device  102  can be connected here to a dimming device  110 , which connects the energy store  20  to the lamp arrangement  14 . 
         [0181]    The switching arrangement  30  also includes a second switching device  112 . The second switching device  112  comprises a contact sensor  114 , which for example can be formed as a capacitive sensor and can be triggered by contact with an operating member  32 , such as a finger. The second switching device  112  also includes a sleep control unit  116 , which is connected to the contact sensor  114 . The sleep control unit  116  is also connected to a time-delay member  118 , which is connected to the first switching device  102 . The sleep control unit  116  serves to actuate a switch  120  of the second switching device  112 , which is connected in series with the first switching device  102 . 
         [0182]    Since the first switching device  102  consumes power during operation on account of the emitter  106 , the switch  120  is opened via the time-delay member  118  a certain period of time after the last detection of a switching operation, so as to set the luminaire or the control arrangement  18  to a sleep mode. When contact is detected at the contact sensor  114 , the sleep control unit  116  is initiated so as to cancel the sleep mode by closing the switch  120 . The lamp arrangement now lights up again, and the contactless sensor  104  is supplied with power again, such that the luminaire can be dimmed again. 
         [0183]    The time-delay member  118  can be set up to switch off the luminaire in an automated manner after a predetermined time. 
         [0184]    In an embodiment illustrated in a dashed manner in  FIG. 8  the sleep control unit  116  can also be designed to open or close a switch  122 , which supplies power to the contactless sensor  104 . By way of example, the switch  112  can be opened after the last actuation of the contactless sensor  104  after a predetermined period of time of, for example, one minute (preferred range 30 seconds to 5 minutes), such that power is no longer supplied to the contactless sensor  104 . The switch  120  can remain closed in this variant, such that power continues to be supplied to the lamp arrangement  14 , more specifically at the output level set by the dimming device  110 . 
         [0185]    When an operator wishes to then switch off the luminaire or change the output, he/she must first cancel the sleep mode via the contact sensor  114 , whereby the switch  122  is closed, such that a contactless dimming of the lamp arrangement is possible again, and/or the lamp arrangement can be switched off. 
         [0186]    The two variants can also be combined with one another such that the sleep control unit  116  can be used both for long-term switch-off of the lamp arrangement  14  and for short-term deactivation of the contactless sensor  104 . 
         [0187]      FIGS. 9 and 10  show a further embodiment of a luminaire  12 G. The luminaire  12 G has a body  16  with a foot  48  and a head  54 , the head  54  being connected to the foot  48  via a joint  56 . The head  54  can be constructed identically to the luminaire  12 F of  FIGS. 3 to 5 . The rotational joint  56  can also be formed identically. The foot  48  preferably has dimensions similar to those of the head. The foot  48  and the head  54  can be oriented in a plane via the rotational joint  56 , such that the luminaire  12 G can be placed flat in a pocket. 
         [0188]    The foot  48  constitutes a supporting/holding portion  34 , since the luminaire  12 G can be placed via the foot  48  on any surface. An interface arrangement  26 G can also be formed on the foot  48  in order to charge an energy store  20  received in the foot  48 . The interface arrangement  26 G can be a micro USB interface, for example. 
         [0189]    The head  54  has an upper side, on which the switching arrangement  30  is formed. The upper side is preferably formed from metal, in particular from an aluminum alloy. The lamp arrangement  40  can include an opaque panel, which is formed with holes, through which an array of LEDs illuminates. 
         [0190]    The foot  48  has an upper shell  130 , which is likewise preferably produced from a metal, in particular from the same type of metal as the upper part of the head  54 . The foot  48  also has a lower shell  132 , which is preferably produced from plastic. The upper shell  130  and the lower shell  132  preferably have an identical basic shape and enclose a volume, within which the energy store is received. One or more magnets can also be received within this volume so as to not only be able to set down the foot on a horizontal surface, but so as also to be able to secure the foot to a magnetizable or magnetic counter means. 
         [0191]    An on/off switch  134  can also be formed on the lower shell  132 , which switch interrupts the power supply between the lamp arrangement  14  and the energy store  20 . The on/off switch  134  is formed in the present case is a mechanical switch, but could also be formed as a contact sensor  114 , similar to that illustrated in  FIG. 8 . 
         [0192]    A further embodiment of a luminaire  12 H is shown in figures in  11  to  14  which can correspond in general in terms of structure and operating principle to the luminaires  12   d  in  FIGS. 12 and 12F  in  FIGS. 2 to 5 , a body  16 H of the luminaire having a pillar-like main body  52 , on which a handle  78  can be formed, as shown for example in  FIG. 4 , and at the upper end of which a luminaire head  54  can be fixed, in particular via a hinged connection  56 . 
         [0193]    Elements similar to those in the above-described embodiments are therefore designated by the same reference signs. Primarily the differences will be explained hereinafter. 
         [0194]    It can be seen in  FIG. 11  that a charge indicator or state of charge indicator is formed on the upper side of the foot  48 H. The state of charge indicator  140  can indicate a state of charge of an electrical energy store  20  which is received in the foot  48 H, as indicated schematically in  FIG. 12 . There, it can also be seen that an energy store cover  138  can be formed on the underside of the foot  48 H, via which energy store cover the energy store  20 , which can be formed in the manner of a rechargeable mobile telephone battery, can be replaced. 
         [0195]    The state of charge indicator  140  can also have further features as have been described in the introduction. 
         [0196]    The foot  48 H has an underside  142 , which defines a supporting plane, that is to say a plane over which the luminaire  12 H is supported. Since the luminaire  12 H is a freestanding luminaire, the supporting plane is oriented parallel to a horizontal. 
         [0197]    An electrical connection arrangement  82 H of an interface arrangement  26 H of a charging device  22 H is also illustrated in  FIGS. 11 to 14 . The connection arrangement  82 H serves in this case to connect charging contacts  146  on a charging device housing  83 H to luminaire contacts  148 , which are formed on the foot  48 H of the luminaire  12 H. The connection arrangement  82  can also include one or more magnets in order to magnetically hold the connection arrangement  82 H in the coupled position so that, on the one hand, a separation of the connection arrangement  82 H is facilitated, but, on the other hand, a coupling can also be facilitated. 
         [0198]    The connection arrangement  82 H defines a connection axis  144 , which in the present case is oriented transversely, in particular perpendicularly, to the supporting plane  142 . 
         [0199]    The connection axis  144  is defined by the direction in which the charging contacts  146  and the luminaire contacts  148  are brought into contact with one another or are to be aligned. 
         [0200]    In the present case a recess  150  is provided on the foot  48 H of the luminaire  12 H, which recess is preferably formed below the region of the foot  48 H from which the pillar-like main body  52  extends upwardly. The recess  150  is open to a side face  92 H of the foot  48 H and is also open to the underside  142  of the foot  48 H. 
         [0201]    The recess  150  has a recess cone  152 , which is arranged concentrically with the connection axis  144 . The recess cone  152  has a large diameter in the region of the underside  142  and tapers toward the upper side of the foot  48 H. The recess cone  152  extends in the peripheral direction about the connection axis  144  over an angle of approximately 180°, more specifically on the side of the recess  150  arranged opposite the side face  92 H. The luminaire contacts  148  lie within the recess cone  152 . 
         [0202]    The recess  150  also has an insertion bevel  154 , which in particular can be seen in  FIG. 14  and which starts from the side face  92 H and tapers toward the recess cone  152 . 
         [0203]    The insertion bevel  154 , in conjunction with the recess cone  152  and the fact that the charging contacts  146  and the luminaire contacts  148  are oriented concentrically with the connection axis  144 , makes it possible for a charging device housing  83 H extending in part into the recess  150  to pivot parallel to the underside  142  (supporting plane) through an angle  156  which lies in a range of from 10° to 90°, in particular in a range of from 15° to 45°. This makes it possible to produce the connection arrangement or the coupling of the contacts  146 ,  148  in a large number of different relative positions between foot  48 H and charging device housing  83 H. 
         [0204]    As is shown in  FIGS. 15 and 16 , the charging device housing  83 H preferably has a substantially cuboidal base  160 , which at one longitudinal end has a cone extension  162 , which defines a housing cone  164  which conically tapers from an underside of the charging device housing  83 H and extends over an angle of greater than 180° and preferably less than 270°. The housing cone  164  is adapted in terms of dimensions and cone pitch to the recess cone  152  of the recess  150 . 
         [0205]    The cone extension  162  has, on its upper side, a flat circular face  166 , which preferably protrudes toward an upper side of the base  160 . As is shown in  FIG. 16 , a housing magnet part  168  can be provided on the circular face  166  and can cooperate with a soft-magnetic portion of the recess  150  in order to magnetically hold the connection arrangement in the manner of a magnetic dock. 
         [0206]    A first charging contact  170  of the charging contacts  146  is also preferably provided on the circular face  166 . The first charging contact  170  is formed as a circular central contact. A second charging contact  172 , which is formed as a ring contact, is also formed on the circular face  166 , more specifically concentrically with the first charging contact  170  and radially distanced herefrom. 
         [0207]    The charging contacts  170 ,  172  form the above-described charging contacts  146  and correspond in terms of shape and arrangement to the luminaire contacts  148 . One of the charging contacts  170 ,  172  can be a positive pole. The other charging contact can be a negative pole. A DC voltage can be provided via the charging contacts  170 ,  172  and is suitable for charging the energy store  20 , for example a voltage in a range of from 4 to 24 volts. 
         [0208]    An electrical standard interface  174 , which can be formed as a computer interface, in particular as a USB interface, is formed on the longitudinal end of the base  160  opposite the cone extension  162 . A plug of a standard charging cable  176  can be inserted into the interface  174 , which in particular can be formed as a socket. The other end of the standard charging cable  176  can be connected to a standard charging converter  178 , which for example can be inserted into a power outlet  58 . The standard charging converter  178  converts the AC voltage provided at the power outlet  58  into a DC voltage, which can be guided via the standard charging cable  176  to the electrical standard interface  174 . This charging voltage is tapped within the charging device housing  83 H by contacts of the electrical standard interface  174  and can then be electrically connected to the charging contacts  170 ,  172 . 
         [0209]    The charging device housing  83 H in this embodiment preferably does not have its own charging electronics. Rather, a standard charging converter  178  can be used to charge the energy store  20 . 
         [0210]    The charging device housing  83 H is formed in particular so as to be arranged on a floor or flooring surface. An upper side of the base  160 , which is designated in  FIGS. 15 and 16  by  88 H, can serve as a foot placement surface, similarly to that illustrated in  FIG. 6 . 
         [0211]    In order to dock the luminaire  12 H at the charging device housing  83 H located on the floor, the luminaire is moved such that the recess  150  is approximately aligned with the cone extension  162 . Due to the fact that the insertion bevel  154  is provided, and due to the fact that the housing cone  164  can cooperate with the recess cone  152 , a centering is provided with respect to the connection axis  144 , even if there is initially a certain misalignment. The cone extension  162  is also drawn magnetically against the “ceiling” of the recess  150  along the connection axis  144  on account of the housing magnet part  168  so as to thus electrically connect the charging contacts  146  to the luminaire contacts  148 . 
         [0212]    The dimensions of the recess  150  and of the cone extension  162  can be such that the charging device housing  83 H still rests on a floor when the contacts  146 ,  148  are coupled. However, the charging device housing  83 H can also be lifted slightly with respect to the floor, more specifically on account of the magnetic holding forces of the housing magnet part  168 . 
         [0213]    In order to separate the connection arrangement  82 H, the luminaire can be lifted up, a foot preferably being placed on the base  160  so as to overcome the magnetic forces of the housing magnet part  168  during this process. If the luminaire is removed unintentionally from the power outlet  58  beyond the length of the standard charging cable  176 , the unintentional forces occurring here can likewise release the magnetic holding forces, the connection arrangement being separable in this way without resulting in destruction. A separation of the connection arrangement  82 H can thus likewise be facilitated. 
         [0214]    The charging device housing  83 H and foot  48 H or recess  150  thereof can be coupled either by sliding the foot parallel to the underside  142  in the direction of the housing cone  164 , or vice versa. Here, the contacts  146 ,  148  are firstly aligned in a direction parallel to the underside  142  or the supporting plane. However, contact is again made parallel to the connection axis  144 , since the housing cone  164  is drawn into the recess cone  152  on account of the magnetic forces, more specifically parallel to the connection axis  144 . A lateral approaching movement, which only at the end leads to the movement of charging device housing  83 H and foot  48 H along the connection axis  144 , is indicated schematically in  FIG. 13  by an arrow. 
         [0215]    Of course, the foot  48 H and charging device housing  83 H can also be coupled and decoupled purely vertically, as is indicated schematically in  FIGS. 11 and 12 . 
         [0216]    The luminaire arrangement shown in  FIGS. 11 to 16  with the luminaire  12 H and the charging device housing  83 H, which is formed in the manner of a magnet dock, can be combined with any of the above-described embodiments. In particular, in addition to the electrical connection arrangement, an inductive interface arrangement can be provided. A wireless communications device can also be integrated, via which the portable luminaire can be switched or dimmed jointly with other luminaires. Lastly, a switching arrangement for actuating the luminaire can be constructed in a similar manner to that described with reference to  FIG. 8 . 
         [0217]    The pillar-like main body  52  can be coupled to a luminaire head  54 , as is illustrated in  FIG. 5 . 
         [0218]    A luminaire family for a further embodiment of a luminaire arrangement is shown in  FIGS. 17 to 24 . The luminaires of  FIGS. 17 to 24  correspond generally in terms of structure and operating principle to the above-described luminaires, more specifically in particular the luminaires  12 B,  12 D and  12 E of  FIG. 2 . The luminaires of the luminaire family of  FIGS. 17 to 24  are preferably wall luminaires, ceiling luminaires or pendant luminaires. The luminaires of  FIGS. 17 to 24  preferably share magnetic holding technology in order to secure the luminaires to the wall, to the ceiling, or to a pendant. 
         [0219]    In  FIGS. 17 and 18  a first luminaire of this luminaire family is illustrated schematically and designated generally by  12 I. 
         [0220]    The luminaire  12 I has a flat cuboidal body  180 , which has a body front side  182  ( FIG. 17 ) and a body rear side  184  ( FIG. 18 ). The body rear side  184  forms a supporting plane, which lies parallel to a securing plane (wall or ceiling or the like). 
         [0221]    A switching arrangement  30 I, which can correspond in terms of structure and operating principle to the switching arrangement  30  as has been described with reference to the luminaire of  FIG. 5  and the luminaire of  FIGS. 9 and 10 , can be provided on the body front side  182 . A charge indicator  140 I, via which a state of charge of an energy store  120 I integrated in the body  180  can be queried or displayed, is also arranged on the body front side  182 . 
         [0222]    An electrical standard interface  174 I is formed on a side face  92 I and can be identical to the standard interface  174  of the charging device housing  83 H of  FIGS. 15 and 16  or to the interface  26 G indicated schematically in  FIGS. 9 and 10 . In the present case the standard interface  174  forms part of an electrical interface  26 I of this type. 
         [0223]    The body  180  is connected on a longitudinal end opposite the side face  92 I to a planar lamp or a luminous panel  186 . The luminous panel  186  can be an opaque Plexiglas plate, for example, but can also be a glass plate with interspersed particles. 
         [0224]    The luminous panel  186  is fed via a feed portion  182 . In particular, light is coupled into a side edge (not shown) of the luminous panel  186 . The feed portion  188  is arranged in the manner of a strip in the region between the body  180  and the luminous panel  186 . The feed portion  188  preferably has a plurality of LEDs arranged along a strip form, which are fed from the energy store  20 I. 
         [0225]    The body  180  has a frame  190 , which surrounds the luminous panel  186 . In some cases, however, the frame  190  can also be omitted. 
         [0226]    The luminous panel  186  with the frame  190  is angled relative to the body front side  182  and/or the body rear side  184  by an angle  192 . The angle  192  can lie in a range of from 3° to 90°, in each case inclusive, and preferably lies in a range of from 15° to 45°, in each case inclusive. 
         [0227]    The feed portion  188  can also be inclined with respect to the side face  92 I by an angle (not specified in greater detail) in a range of from 5° to 60°. The feed portion  188 , however, can also be oriented parallel to the side face  92 I and/or perpendicularly to side faces arranged therebetween (not specified in greater detail). 
         [0228]    Due to the angling of the luminous panel  186  relative to the body  180 , it is possible, when the luminaire  12 I is mounted on a wall or ceiling, for light to irradiate both from the surface of the luminous panel  186  facing toward the body front side  182  and from the opposite surface of the luminous panel facing toward the body rear side  184 . Consequently, a lighting effect in the manner of direct and indirect light can be obtained, to name just one exemplary application for this. 
         [0229]    A communications module  194  is also integrated in the body  180 . The communications model can be, in particular, part of a wireless communications device  36 K, as shown in  FIG. 24 . The communications module  194  can be connected for communication to other luminaires and/or to an operating device  66 . It is preferably possible, via the communications device  36 K, to switch and/or to dim a plurality of luminaires synchronously. 
         [0230]    As can be seen in  FIG. 18 , the luminaire  12 I also has, in the region of the body rear side  184 , an on/off switch and a holding magnet arrangement  196 . 
         [0231]    The magnet holding arrangement  196  in the present case forms a magnet  60 I for mounting the luminaire  12 I on a wall or a ceiling. The holding magnet arrangement  196  here has a centering feature  198 , by means of which the holding magnet arrangement  196  can be centered with respect to a magnetic securing part, which will be described hereinafter. The centering feature  198  can be, for example, a circular protrusion, which protrudes relative to the holding magnet arrangement  196 . 
         [0232]    In one embodiment the luminaire  12 I can be set via the switching arrangement  30 I to a master mode, in which the communications module  194  synchronizes all changes of the state of the luminaire  12 I with a plurality of “slave” luminaires. Generally, however, the communications model  194  of the luminaire  12 I is always a “slave” module, which can be controlled by means of a master in the form of an operating device  66 K, as shown in  FIG. 19 . 
         [0233]    The operating device  66 K has an operating device body  202 , which likewise can be formed as a flat, planar body, with a body rear side illustrated in  FIG. 19 , on which a holding magnet arrangement  196 K can be formed, which is identical to the holding magnet arrangement  196  of  FIG. 18 . 
         [0234]    An electrical energy store  20 K can also be arranged in the operating device body  202 . A standard interface  174 K can also be provided on the operating device body  202  so as to be able to charge the energy store  20 K in this way. 
         [0235]    A communications module  194 K is also formed in the operating device body  202  and is preferably formed as a “master” module and can be connected for communication to a plurality of luminaires (such as a plurality of luminaires  12 I or also any other of the above-described luminaires) so as to control these synchronously. 
         [0236]    A charge indicator  140 K can be arranged on the front side (not shown in greater detail) of the operating device body  202 , as can also a switching arrangement  30 K. The switching arrangement  30 K and the charging indicator  140 K can be formed identically to the corresponding elements  30 I and  140 I of  FIG. 17 . 
         [0237]      FIG. 20  shows a further embodiment of a luminaire  12 L, which generally corresponds in terms of structure and operating principle to the luminaire  12 I. Like elements are therefore designated by like reference signs. Primarily the differences will be explained hereinafter. 
         [0238]    The luminaire  12 L can preferably be temporarily secured to a pendant  206 , more specifically preferably by means of a holding magnet arrangement  196 L, which is formed on a rear side or upper side of the luminaire  12 L, which is not visible in  FIG. 20 . 
         [0239]    The luminaire  12 L has a body  180 L, which is preferably formed as a semi-circular plate. A switching arrangement  30 L and a charge indicator  140 L can be formed on an underside  182 L of the body  180 L and can correspond to the elements  30 I and  140 I of  FIG. 17 . 
         [0240]    An electrical energy store  20 L is also integrated in the body  180 L, as is also a communications module  194 L, which can be generally comparable in terms of structure and operating principle to the corresponding elements  20 I,  194 I of the luminaire of  FIG. 17 . 
         [0241]    The luminaire  12 L also preferably has a semi-circular luminous panel  186 L, which is shaped such that the body  180 L and the luminous panel  186 L together define a circle, for example. Similarly to the embodiment of  FIGS. 17 and 18 , however, the luminous panel  186 L is angled relative to the body  180 L by an angle  192 L, which can lie in an angular range similar to the above-described angle  192 . 
         [0242]    A semi-circular frame  190 L can also be provided around the luminous panel  186 L. 
         [0243]    A feed portion  188 L is provided between the body  180 L and the luminous panel  186 L, by means of which feed portion light can be coupled into a side edge of the luminous panel  186 L. Light is preferably again emitted from a surface of the luminous panel  186 L facing toward the underside  182 L, and preferably also from a surface of the luminous panel  186 L facing toward the upper side (not illustrated). 
         [0244]    The pendant  206  can be formed for example by a single cable, which at its upper end is secured purely mechanically to a ceiling, for example. A magnetic securing part can be secured to the underside or the free end of the pendant, which magnetic securing part can cooperate with the holding magnet arrangement  196 L (not shown in greater detail in  FIG. 20 ). The holding magnet arrangement  196 L is preferably secured to the upper side of the body  180 L concentrically with a circle shape, which circle shape is defined by the body  180 L and the luminous panel  186 L. Consequently, the luminaire  12 L can be secured to the pendant  206  such that the body  182 L is preferably oriented horizontally. 
         [0245]      FIGS. 21 and 22  show a magnetic securing part  210 , as can be secured for example to a wall or to an end of a pendant  206 . The magnetic securing part  210  has a main body formed from a soft-magnetic material, which is approximately circular and has a centering means  212  in the form of a circular axial indentation. The centering feature  198  of the holding magnet arrangement  196  can engage in this indentation or in this centering means  212 , for example. 
         [0246]    The magnetic securing part  210  preferably has a securing portion centrally, which for example can be formed by a bore, via which a screw  218  can be passed through.  FIG. 22  shows that a screw of this type passes through the securing portion  214  and is fixed in a wall  46  at a wall plug (not specified in greater detail). 
         [0247]    The magnetic securing part  210  can also preferably have a holding magnet mount  216 , in which the holding magnet arrangement  196  can be completely received. An aesthetically pleasing magnetic connection can be established in this way. 
         [0248]      FIG. 23  shows, in schematic form, a feed portion  188 , which is formed in a strip-like manner with a plurality of LEDs (not specified in greater detail), which couple their light into a side face  220  of a luminous panel  186 . By way of example, the luminous panel  186  can be formed as an opaque panel so that total internal reflection within the panel is avoided. However, particles can also be integrated in the panel  186  in order to be able to couple light out via the surfaces oriented perpendicularly to the side face  220 . 
         [0249]      FIG. 24  shows, in schematic form, a luminaire arrangement  10 M, which for example includes a plurality of luminaires  12 I and a luminaire  12 L. The luminaire arrangement  10  also includes an operating device  66 K, as shown in  FIG. 19 . 
         [0250]    In  FIG. 24  it can first be seen that, in the case of the luminaire  12 L, a magnetic securing part  210  is fixed at an end of a pendant  206  and is fixed to the upper side of the body  180 L by means of a holding magnet arrangement  196 L. An on/off switch  200 L can also be arranged on the upper side of the body  180 L. 
         [0251]    As indicated schematically by arrows  64 , the luminaires  12 I and  12 L can be controlled synchronously by means of the operating device  66 K. 
         [0252]    In  FIG. 24  the operating device  66 K is shown attached to a standard charging cable  176 . However, the operating device  66 K can also be decoupled from a charging cable  176  of this type and can be temporarily fixed to a wall merely via its holding magnet arrangement  196 K ( FIG. 19 ). 
         [0253]    The luminaires  12 I,  12 L of  FIG. 24  and also the operating device  66 K can each be removed from their place of temporary mounting by means of the magnetic securing part  210  and holding magnet arrangement  196  and can each be charged at a central charging location, more specifically via a standard charging converter  178  and a plurality of standard charging cables  176 . 
         [0254]      FIG. 25  shows a preferred embodiment of a luminaire arrangement  10 M with a charging device  22 M, which has a charging station  240 . 
         [0255]    The charging station  240  includes a base  242 , which example can be placed on a flat surface. A plurality of luminaire mounts  244  (in the present case four) for temporarily receiving a corresponding plurality of luminaires are also formed on an upper side of the base  242 . In the present case the charging station  240  is designed to charge luminaires  12 I, as are shown in  FIGS. 17 and 18  and also in  FIG. 24 . The charging station  240  is preferably also suitable for recharging an operating device  66 K, as is shown in  FIG. 19 . However, the charging station  240  can also be adapted such that it is suitable for recharging other types of luminaires, in particular luminaires which are formed as wall, ceiling, or pendant luminaires. 
         [0256]    In the present case, four luminaire mounts  244  are formed on the base  242  and are designed to receive four luminaires  12 I 1 ,  12 I 2 ,  12 I 3  and  12 I 4  of the luminaire type shown in  FIGS. 17 and 18 . 
         [0257]    Here, interface arrangements  26 M 1 ,  26 M 2 , etc. are formed in the region of the luminaire mounts  244  and are designed to cooperate with the interfaces  174 I 1 ,  174 I 2 , etc. provided on the luminaires  12 I. 
         [0258]    Wiring  246  is provided inside the base  242  and is designed to connect these interfaces  174 I 1 ,  174 I 2 , etc. to a central charging interface, which is formed in the present case by “luminaire” contacts  148 M on the upper side of a recess  150 M formed in the bottom of the base  242 . 
         [0259]    The recess  150 M corresponds in terms of structure and operating principle to the recess  150  shown in figures in  11  to  14  (in that case for the foot of a freestanding luminaire). The same recess with the identical contacts  148 M is provided in the present case on the base  242 , such that the charging device housing  83 H can be slid into the recess  150 M via the cone extension  162 . The charging device housing  83 H is preferably structured identically to the charging device housing  23 H of  FIGS. 15 and 16 . 
         [0260]    Consequently, a standard interface  174  is provided at an end of the charging device housing  83 H opposite the cone extension  162 , into which standard interface a plug of a standard charging cable  176  can be inserted, said charging cable being connected at the other end to a standard charging converter  178 . 
         [0261]    Alternatively to the embodiment in which a recess  150 M for receiving a portion of the charging device housing  83 H is formed on the charging station  240 , a standard charging interface  174 M could also be provided on the charging station  240 , into which standard charging interface a plug of the standard charging cable  176  could be directly inserted. In this case, this interface  174 M would be connected in parallel with the interfaces  174 I 1 ,  174 I 2 , etc. via a corresponding wiring. 
         [0262]    Retaining struts  250  can be provided in order to mechanically fix the luminaires  12 I to the charging station  240  and extend upwardly starting from the base  242  and form a mechanical part of the luminaire receptacles  244 . 
         [0263]    Furthermore, the recess  150 M can be formed at any point in the region of the base  242 . However, the recess  150 M is preferably provided at an axial end of the base  242 . 
         [0264]    The axial direction of the base  242  preferably lies parallel to the body front sides  182   1 ,  182   2 , etc. of the luminaires  12 I 1 ,  12 I 2 , etc. inserted into the charging station  240 . 
         [0265]    The charging station  240  preferably also has a hoop or handle  248 , which extends in a U-shaped manner above the base  242  and is connected to the axial end of the base. The hoop  248  is preferably longer than the height of the luminaires  12 I inserted into the charging station  240  so that the charging station  240  with the luminaires  12 I inserted therein can be easily carried by means of the hoop  248 . 
         [0266]    For coupling to the charging device housing  83 H, the charging station  240  can be moved such that the mount  150 M is moved into the vicinity of the cone extension  162 , where the contacts  146  and  148 M are contacted with automatic centering on account of the housing magnet part  168 . To separate the charging station  240  from the charging device housing H, the upper side  88 H of the charging device housing  83 H can then be pressed by hand or by means of a foot in order to fix this and facilitate a removal of the charging station  240  from the charging device housing  83 H. 
         [0267]    It is to be understood that the foregoing description is not a definition of the invention, but is a description of one or more preferred exemplary embodiments of the invention. The invention is not limited to the particular embodiment(s) disclosed herein, but rather is defined solely by the claims below. Furthermore, the statements contained in the foregoing description relate to particular embodiments and are not to be construed as limitations on the scope of the invention or on the definition of terms used in the claims, except where a term or phrase is expressly defined above. Various other embodiments and various changes and modifications to the disclosed embodiment(s) will become apparent to those skilled in the art. All such other embodiments, changes, and modifications are intended to come within the scope of the appended claims. 
         [0268]    As used in this specification and claims, the terms “for example,” “e.g.,” “for instance,” “such as,” and “like,” and the verbs “comprising,” “having,” “including,” and their other verb forms, when used in conjunction with a listing of one or more components or other items, are each to be construed as open-ended, meaning that that the listing is not to be considered as excluding other, additional components or items. Other terms are to be construed using their broadest reasonable meaning unless they are used in a context that requires a different interpretation.