Abstract:
A string of decorative string lights with a plurality of light fixtures that radiate light throughout each separate fixture joined by spacer beads that additionally catch and reflect the light given off by the LED&#39;s within each adjacent light fixture. The LED&#39;s are mounted in an inverted position in the unique socket assembly made of a translucent material to diffuse the concentrated light given off by the LED. Each socket is covered with a decorative globe to further diffuse light transmission. The light fixtures on the decorative string lights can be very small to be used as illuminated jewelry as well as larger for Christmas and advertising lighting

Description:
[0001]    This application claims the benefit of U.S. Provisional Application No. 60/472,670 filed May 21, 2003. This invention relates to string lighting in which a plurality of lights provides illumination and receives power through an elongated power chord communicating with a power source, commonly called decorative light sets. More particularly it relates to decorative type lighting which conventionally is provided in long strings such as Christmas tree lights, Christmas house decoration lights, or strings of lights used in landscaping, decoration or other illuminated means of ornamentation. The device as disclosed replaces the incandescent or resistance style light bulbs used in conventional string lights with a novel component housing and a light emitting diode or other light source. Pluralities of such component housings are attached to the elongated electrical cabling providing power and thereby provide decorative or illuminating lighting in strings. These light strings may use conventional house current, low voltages through a transformer, or batteries.  
     
    
     
       FIELD OF THE INVENTION  
       BACKGROUND OF THE INVENTION  
         [0002]    String lighting sets have long been used in the United States and throughout the world in a commercial atmosphere to provide illumination such as in car lots or for enhancing trees or the like at night. Such string lights are also used worldwide on Christmas trees and as decorative lighting on houses and businesses for festive periods and advertising.  
           [0003]    Conventional string light sets suffer from a number of problems inherent to such lights. One such lighting problem arises when low voltage lights are used and strung in series. This type of lighting is done with mini-bulbs and uses a large number of small voltage bulbs which are then wired in series and add up to the total voltage applied to the power chord. Unfortunately, when wired in series, if one bulb breaks or comes lose or burns out, the whole string tends to cease providing light. With each bulb consuming a watt or so, the string lights do tend to consume a large amount of current when used with 120 volts.  
           [0004]    Lights that are strung on a long chord in parallel, while not suffering from termination of illumination if one light fails, suffer from the fact that they all must be able to handle the higher voltage that is applied to the string when one or more lights are lost and thereby each light produces more heat and will not last as long. The heat buildup even from the smaller bulbs can be a significant factor and from the larger high voltage bulbs the heat and high current requirements consume excessive energy as well as causing cooling problems, premature failure and possibly a fire hazard.  
           [0005]    References Cited  
           [0006]    U.S. Pat. No. 4,675,575 of Elmer L. Smith describes a light string system that is provided having a plurality of mono-color or bi-color light-emitting diodes electrically connected thereto. Each light-emitting diode has a generally elongated, hollow envelope mounted thereover, and the envelope is substantially filled with light conducting optical spheres or even fragments. The envelope may be additionally filled with light-conducting epoxy, light-conducting liquid or light conducting gas and sealed for improved light transmission and dispersion characteristics. The light-emitting diodes may include an improved base with light-emitting diode leads disposed approximately perpendicular to the axis of the envelope for bulb stability and for enabling the bulb to stand upright on the branches. Both the envelope and the optical spheres include light-conducting glass or plastic material. The spheres may be either hollow or spherical and may be of a uniform or a mixed size. Additionally, the spheres may be large for stacking in single file within the envelope or centrifuged to the sides of the envelope with the center devoid of spheres.  
           [0007]    This patent endeavors to solve the problem of the concentrated light source by defusing the light through the hollow envelope filled with light conducting optical spheres or fragments where the so disclosed patent s the light by inverting the LED and passing the light through the socket and decorative globe. This patent also does not have the unique current limit circuit.  
           [0008]    U.S. Pat. No. 5,300,864 of Franklin J. Allen Jr. teaches of a programmable lighting control system for decorative, artistic, and Christmas lighting applications including a plurality of outlet receptacles for connection thereto of series or parallel connected Christmas tree lighting strings or the like, a plurality of associated output select switches to individually select a lighting condition signal for each respective outlet receptacle, timing and control circuitry to generate a plurality of lighting condition signals that are applied to solid-state switching devices to drive the outlet receptacles, an output timing phase synchronization feature initiated at user discretion to synchronize the timing phase of each of the plurality of lighting condition signals, and a memory function to retain the last programmed lighting display conditions of user-selected, entirely unique lighting patterns when using a plurality of lighting strings.  
           [0009]    This patent uses a control circuitry to generate a plurality of lighting conditions, but does not specifically use LED&#39;s and does not incorporate the unique current limit circuit.  
           [0010]    U.S. Pat. No. 5,313,187 of Robert S. Choi et al. discloses one or more super luminescent light emitting diodes (SLDS) that are driven with an oscillatory square wave pulse drive signal which produces a brilliant rapidly flashing light having high on-off contrast for enhanced visibility and perceptibility at a distance thus being usable for battery-powered visual indicator and warning flasher applications. The pulse on time and off time and thus the flash frequency and duty cycle are determined by RC time constants of feedback circuits in the oscillator stage and thus can be set by selecting appropriate component values.  
           [0011]    This patent has been designed primarily for visual indicator and warning flasher applications and not for decorative illumination in any way.  
           [0012]    U.S. Pat. No. 5,495,147 of Vincent A. Lanzisera additionally describes an LED light string system constructed according to teachings of the present invention comprised of a string of LED&#39;s and a regulated power supply. The string of LED&#39;s comprises a plurality of LED&#39;s interconnected in parallel. The regulated power supply provides a constant current and a constant voltage to the LED&#39;s. The LED light string system may be used for decorative, signaling and a variety of other applications.  
           [0013]    This patent has the regulated power supply and uses LED&#39;s but does not incorporate the inverted LED within the unique socket for defusing the concentrated light source.  
           [0014]    U.S. Pat. No. 6,265,834 of Mei-Lu Lin tells of a tubular string of Christmas lights that includes a transparent hose, an arcuate strip disposed into the hose having a pair of electrical wires integrated therein and a pair of inlets at each end, a plurality of Christmas lights disposed into the hose and alternately connected to the electrical wire through a pin with barb at the free end with a plug having a pair of blades at one end made engageable into the inlets of the electrical wires and a pair of sockets at the other end for engaging within the blades of an additional plug. The tubular string of the Christmas lights can be cut into different lengths to cope with the requirement of the user, and can be connected together by the plugs.  
           [0015]    This patent for a tubular string of Christmas lights does not use LED&#39;s and does not incorporate the unique current limit circuit.  
           [0016]    U.S. Pat. No. 6,344,716 by James W. Gibboney, Jr. describes an electrical circuit for use with plural, low voltage leads such as a string of Christmas lights, comprising groups of lights placed electrically in a series circuit, but the lights within each group are in parallel, preferably with a semiconductor device in parallel with each group to limit current and voltage in the group. By suitable choice of bulb, group size and number of groups, a light string can be fashioned that uses about one-third the power with much less heat production and without loss of brightness. The semiconductor device can consist essentially of diodes such as two silica diodes on either side of a Zeuer diode, or a custom bipolar device.  
           [0017]    This patent describes an electrical circuit, but does not specify the use of LED&#39;s or use the unique light-diffusing socket within a decorative globe.  
           [0018]    U.S. Pat. No. 6,461,019 (Allen) teaches a method and structure for placing LED&#39;s in series strings and then wiring the strings in parallel to yield a string of lights. However, Allen only addresses the issue of stringing sufficient lights to yield the correct voltage across the parallel AC line and lacks any teaching for mounting the lights in a carrier designed to evenly disperse light.  
           [0019]    As such, none of the foregoing prior art teaches or suggests the particular device that will advance and refine the vast field of decorative illumination.  
         SUMMARY OF THE INVENTION  
         [0020]    In this respect, before explaining at least one embodiment of the invention in detail, it is to be understood that the invention is not limited in its application to the details of construction and to the arrangement of the components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments and of being practiced and carried out in various ways. Also, it is to be understood that the phraseology and terminology employed herein are for the purpose of description and should not be regarded as limiting.  
           [0021]    The new decorative string lights disclosed and described within this patent incorporate a unique current limit circuit that will deliver a fixed amount of power to a plurality of light fixtures, which are cooperatively engageable with Light Emitting “Diodes (LED) as their light source. LED&#39;s produce high intensity light at very low voltages with little heat build up and thereby solve many of the problems associated with string lights of the past. The device solves the problems of LED lighting that were conventionally hard wired, by providing a unique light fixture that engages over the wires providing power from a conventional power source. The disclosed device provides light fixtures with the LED&#39;s attached in a unique socket within the light fixtures that are located on the power cord. All the light fixtures attached to each power cord will have the power controlled by the current limit circuit with full power continuing on to the next set of decorative string lights if desired.  
           [0022]    Also, the LED&#39;s may be inserted and removed from the socket for replacement and maintenance, which solves the problem of LED lights that are hardwired in conventional string lights.  
           [0023]    Still further, each light fixture consists of a socket that acts as a light diffusion device for the LED, which is inserted in an inverted position into the socket. A decorative globe is removably attachable to the socket to surround the LED and socket providing a filter to color the light, protection to the LED, and an additional light diffuser to make the light from a very small LED illuminate the decorative globe.  
           [0024]    The device also offers a unique spacer bead, which may be located between the decorative globes to catch and disburse light to the viewer while further enhancing the light projection capabilities of the device.  
           [0025]    The current limit circuit, used on the device when powered by A.C. current, delivers the fixed amount of power to the LED&#39;s and has two modes of operation. The first mode is the charging of a storage device, in this case a capacitor labeled C1. The second mode is the delivering of a fixed amount of power to the LED&#39;s. AC current reverses the voltage on two wires each half cycle, therefore the voltage at J3 alternates with respect to J1, being positive during one half cycle (first mode) and negative during the other half cycle (second mode).  
           [0026]    The operation during the first mode is very simple. The diode D6 conducts current as soon as the voltage rises above about 0.6V. The current increases through R4 and charges C1 to a voltage limited by D9. Therefore D9 establishes the amount of power stored on C1.  
           [0027]    The operation during the second mode is a little more complex. When the voltage on J1 is positive enough to exceed the voltage drop required by the LED devices to allow them to conduct, the current limit comes into play. Because the voltage established on C1 is present, it turns on Q1. The current flows through Q1 and R1 to the LED chain. As the current increases the voltage drop increases across R1. This voltage drop allows R3 to discharge C1. The amount of discharge is determined by the amount of power being applied to the LED&#39;s. When the power stored on C1 has been drained off by R3 enough Q1 stops conducting.  
           [0028]    The attached drawings depict a number of preferred embodiments of the device and the components thereof. While the present invention has been described herein with reference to particular embodiments thereof, and shown in some preferred embodiments in the drawings attached hereto, a latitude of modifications, various changes and substitutions are intended in the foregoing disclosure, and will be appreciated that in some instance some features of the invention will be employed without a corresponding use of other features without departing from the scope of the invention as herein disclosed.  
           [0029]    An object of this invention is to create a set of decorative string lights that are uniquely different in appearance from existing string lights.  
           [0030]    Another object of this invention is to create a set of decorative string lights that use less electricity and last longer and are safer than conventional string lights.  
           [0031]    An additional object of this invention is to create a set of decorative lights that use LED&#39;s for illumination instead of the conventional incandescent bulbs.  
           [0032]    A further object of this invention is to create a set of decorative string lights that use LED&#39;s in an inverted position and are diffused through the translucent socket, so as not to create a hot spot on the decorative enclosures.  
           [0033]    Yet another object of this invention is to create a set of decorative string lights that have the capability of having many more light elements on each string along with reflective members between each light element.  
           [0034]    A further object of this invention is to create a set of decorative string lights that have replaceable LED&#39;s.  
           [0035]    A still further object of this invention is to create a set of decorative string lights that, with a current limit system, will deliver a controlled amount of power to the LED&#39;s within each decorative string light set.  
           [0036]    It is another object of this invention to create a set of decorative string lights that can be made as small as jewelry or as large as desired.  
           [0037]    A final object of this invention is to advance and refine the vast field of decorative illumination. These together with other objects of the invention along with the various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the invention, its operating advantages and the specific objects attained by its uses, reference should be made to the accompanying drawings and descriptive matter in which there are illustrated preferred embodiments of the invention.  
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0038]    The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of this invention.  
         [0039]    [0039]FIG. 1 depicts a perspective drawing of the decorative string light set.  
         [0040]    [0040]FIG. 2 depicts an exploded perspective view of a single light fixture and central socket unit with a spacer bead.  
         [0041]    [0041]FIG. 3 depicts an exploded perspective view of a single light fixture with the central socket unit assembled.  
         [0042]    [0042]FIG. 4 is schematic of a cycle by cycle power control circuit which meters the total electrical power communicated to the LED&#39;s wired in series in the decorative light string. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0043]    Referring now to the drawings, wherein similar parts of the invention are identified by like reference numerals, there is seen in FIG. 1 a preferred embodiment of the herein disclosed decorative string lights device  10  consisting of a plurality of light fixtures  12  operatively attached to a power cord  14 . In a preferred mode of the device  10  the individual light fixtures are separated by one or more spacer beads  16  which during operation will generally absorb and transmit refracted light from adjacent light fixtures  12 .  
         [0044]    The power cord  14  will have a single AC female plug  18  at one distal end, with a single male plug  20  located at the opposite end. The depicted female plug  18  and male plug  20  are shown as the type used in the United States and those skilled in the art will realize that Europe and many individual countries throughout the world have different plug configurations. Such differing plug configurations are anticipated within the scope of this patent and any plug configuration adapted to operatively engage and transmit the AC power supply down the power cord  14  will work.  
         [0045]    The AC male plug  20  in the current best mode of the device  10  will provide a fuse housing  22  along with the current limit circuitry  24  under the cover  26 . As depicted in FIG. 1 the power cord  14  has two wires which would be the simplest form of power chord  14  if only one string is formed. However, if numbers of strings of lights are to be hooked together as is done on Christmas trees and outdoor lighting, a preferred mode of the device would have a contiguous wire  42  and common wire  43  as shown in FIG. 2 which would be a direct AC link between the male plug  20  and female plug  18  limited by the control circuit  24  shown in FIG. 4. Also as shown in FIG. 2, both the contiguous wire  42  and common wire  43  pass around the sides of the socket assembly  34  which it has been found further enhances the elimination of dark spots in the finally working assembly, especially with the use of the inverted LED  52 . The control circuit  24  would meter or control the power transmitted on interconnecting wire  40  only. This third or interconnecting wire  40  would thus provide metered AC current to the light fixtures  12  on the individual string and additional strings plugged into each female plug  20  downline would not be subject to the control circuit  24  in the preceding string which would only meter the power in the interconnecting wire  40  in its own string.  
         [0046]    Each light fixture  12  of one current preferred embodiment of the device  10 , as best illustrated in FIG. 2, will consist of a decorative casing  28 , which in the current preferred mode of the device  10  is formed by two faceted halves  30  and  32  of a formed sphere that cooperatively engage together to enclose the internal parts and form the casing  28 . The casing  28  in a preferred mode of the device is faceted and forms substantially a glob shaped Fresnel lens to dissipate the light from each light fixture  12  at a large number of different angles. It must be understood that the decorative casing  28  is depicted as spherical in shape; however, it is anticipated that the casing  28  could be provided in a wide variety of geometric and decorative shapes depending on the decorative task at hand. The casing  28  could also be formed into animal or festive or religious icon shapes and any of a myriad of shapes to fit the occasion in which the device  10  will be used. Also, the sizes can vary and they may be made of one or a plurality of pieces and in a wide range of colors to enclose the internal parts and disperse externally, the light generated internally, and still remain within the scope of this patent.  
         [0047]    The socket assembly  34  which is encased in the decorative casing  28 , consists of an upper section  36  and a lower section  38  and engages and operatively mounts upon the interconnecting wire  40  and the contiguous wire  42  and ground wire  43 . In its simplest form, the device  10  would function without the upper section  36  and such is anticipated; however, better diffusion of light and protection of the LED  52  or other means for light generation is achieved using the upper section  36 . Also in a simpler embodiment than depicted, the decorative casing  28  could be left off if both the upper section  36  and lower section  38  are engaged and surround the means for light generation from AC power which in the current best mode is an LED  52 . In this fashion, light would be diffused only by the formed socket assembly  34  which instead of being substantially clear or transparent as when using the casing  28 , would be translucent or faceted to better diffuse the light.  
         [0048]    The circuit formed by the interconnecting wire  40  is broken at each socket assembly  34  with contacts  44  and  46  attached at the ends. Contacts  44  and  46  when assembled provided a means for cooperative electrical engagement with the means for light generation from AC power using the connection with the leads  48  and  50  of the current best such means for light generation in the form of LED  52 . As depicted in FIG. 2, in the current best mode of the disclosed device  10 , the LED  52  is inverted in its mount inside the transparent or translucent socket assembly  34 . During experimentation in arriving at the current preferred embodiment of the device  10 , hot spots or bright spots with corresponding dark spots being projected from the decorative casing  28  caused a constant problem. Unexpectedly, after attempts at diffusion and means to rid the decorative casing  28  of the dark and bright spots, the LED was inverted into the socket assembly  34  and unexpectedly substantially eliminated the hot spots and the dull or dark spots from the mounted decorative casing  28  which emitted an even glow from all angles. Consequently, inverted mounting of the LED  52 , accomplished by running the conventional leads  48  and  50  down from a top side engagement to the contacts  44  and  46 , is extremely important and provides great visual enhancement to the even light transmission of the device  10 . Since the LED  52  is inverted into a substantially centered position inside the socket assembly  34 , the socket assembly acts as a diffuser of the generated light. Also, using substantially transparent or translucent material to form both the upper section  36  and lower section  38  light is evenly transmitted through the walls forming the top, bottom, and sides of the socket assembly  34  and eliminates the dark spot that occurs if the LED  52  or other means for light generation were mounted upright in a conventional non transparent socket assembly or even in the disclosed socket assembly  34 . The inverted positioning of the LED  52  or other means for light generation inside a transparent or translucent socket assembly  34  significantly increases the even distribution of light and overall appearance of the device  10  when deployed for decoration. Also, when used with the surrounding decorative casing  28  a very even and pleasing light is transmitted from the decorative casing  28  due to the even light transmission provided by the inverted mount inside the translucent or transparent socket assembly  34  which also acts as a diffuser.  
         [0049]    In the depicted device  10  as best shown in FIG. 2, a transparent or translucent locking plug  54  is inserted at the base  56  of the lower section  38  to lock the contacts  46  and  44  in place with the respective leads  48  and  50  feeding electrical power to the LED  52  or other means for light generation that would use electrical power provided by the interconnecting wire  40 . The locking plug  54  would thus form a portion of the wall of lower section  38  when the socket assembly  34  is fully assembled and is thus also transparent or translucent and of the same material as the lower section  38 . The upper section  36  and the lower section  38  of the socket assembly  34  readily snap together and apart for easy replacement of the LED  52  or other means for light generation if replacement is needed. LED&#39;s  52  would be the preferred means for light generation due to their low power consumption, high light output, low heat, and long life. As noted, all the parts of the socket assembly  34  are made of a translucent material to better diffuse the concentrated light from the LED  52  but could be transparent if less diffusion is desired for some reason.  
         [0050]    In the event that covering of the cord  14  is desired and additional light transmission and diffusion is desirable, a preferred mode of the device  10  places one or more spacer beads  58  between adjacent light fixtures  12 . This spacer bead  58  would best have a faceted exterior which would both absorb and retransmit light generated by the adjacent light fixtures  12 . This is an optional embodiment to provide more light coverage with less cord showing but it must be understood that the light fixtures  12  could be adjacent to each other without the spacer beads  58  or that there can be one or more spacer beads  58  between the light fixtures  12  or any combination thereof, forming and lengthening the decorative string lights  10  as desired.  
         [0051]    As noted above the current best means for light generation is an LED  52  because of the aforementioned characteristics. However, the inverted mounting of any means for light generation such as a light bulb or mini light inside a translucent socket assembly  34  and surrounded by the decorative casing  28  would still yield a significant enhancement in decorative lighting by providing a string of lights with very even light transmission on all surfaces of the surrounding casing  28  and eliminating dark spots or sides as is a significant problem with conventional decorative string lights. As such, the use of other means for light generation are anticipated.  
         [0052]    [0052]FIG. 3 further depicts a perspective view of the decorative string lights  10  having light fixture  12  with the translucent socket assembly  34  assembled for even light transmission from the centrally located LED  52  in its inverted mount. The two halves of the socket assembly are held together by a means for cooperative engagement of the upper section  36  to the lower section  38  which is depicted as the four locating and locking fixtures  60  protruding through orifices  62 . However, those skilled in the art will no doubt realize that other means for cooperative engagement of upper section  36  to the lower section  38  can be used and such are anticipated. Since it is highly probably that the light source inside may need replacement, the best means for cooperative engagement would allow for disengagement of the two halves. However, due to the long life span of LED&#39;s, the device  10  could be manufactured with a permanent engagement of the two halves if a bit less utility is all that is required.  
         [0053]    [0053]FIG. 4 is a schematic depicting a preferred mode of the current limit circuit  64  which in the current best mode is placed inside the male plug  20  in order to limit the current downstream on interconnecting wire  40 . The current limit system has two modes of operation. The first mode is the charging of a storage device, in this case a capacitor labeled C1. The second mode is the delivering of a fixed amount of power to the LED&#39;s when they are illuminating.  
         [0054]    The circuit is thus a means to limit the total power communicated to the LED&#39;s during each AC cycle or oscillation whereby each cycle a certain amount of power is supplied to the LEDs. If the voltage communicated to the circuit  64  from the AC source goes higher, the current communicated would also be higher, but the current is shut off faster by the circuit  64  to thus limit the total power communicated to the LED&#39;s or other means for illumination that are wired on the interconnecting wire  40 . In instances where the voltage from the AC power supply goes down or is reduced, the current communicated through the circuit  64  to the LED&#39;s or light emitting means on the interconnecting wire  40  is lower, and to make the power communicated within the desired upper and lower limits the amount of time the current is delivered to the LED&#39;S in the circuit is increased. This timing of the current and voltage balances the power per cycle and therefore the dissipation and provides a mean to provide balanced power per cycle to the LED&#39;s  52  or other means for light emission at a predetermined power level to match the ability of the LED&#39;s or other means for light emission&#39;s requirements and also prevent burn outs. It thus provides a means to limit the total electrical power communicated to the LED&#39;s  52  between a predetermined minimum and maximum power level depending on the number and voltage of the LED&#39;s which have power communicated to them through the circuit  64 .  
         [0055]    In operation the circuit  64  functions as AC current reverses the voltage on two wires each half cycle. Therefore the Voltage at J3 alternates with respect to J1 being positive during one half cycle (first mode) and negative during the other half cycle (second mode) as would the voltage downstream at J2 and J4 respectively. The operation during the first mode is very simple. The diode D6 conducts current as soon as the voltage rises above about 0.6V. The current increases through R4 and charges C1 to a voltage limited by D9. Therefore D9 establishes the amount of power stored on C1.  
         [0056]    The operation during the second mode is a little more complex. When the voltage on J1 is positive enough to exceed the voltage drop required by the LED devices to allow them to conduct, the current limit comes into play. Because the voltage established on C1 is present it turns on Q1. The current flows through Q1 and R1 to the LED&#39;s. As the current increases the voltage drop increases across R1. This voltage drop allows R3 to discharge C1. The amount of discharge is determined by the amount of power being applied to the LED chain. When the power stored on C1 has been drained off by R3 enough, Q1 stops conducting. The process repeats on the next cycle.  
         [0057]    Since J1 connects directly to J2 and J3 connects directly to J4, a downstream string plugging into the female plug  20  would receive AC power substantially equal in voltage and amperage to that available at J1 and J3. Thus a downstream string of lights would use its own current limit circuit  24  to run the LED&#39;s  52  as would a string downstream from that string.  
         [0058]    An alternate embodiment of the decorative string lights  10  with the LED&#39;s  53  or other means for light emission or generation mounted inverted inside the upper section  36  and lower section  38 , would be operated by a low voltage circuit using a conventional transformer. While not the most preferred mode of the device it would allow for the mounting of the inverted light source and use of low power components. A second alternate embodiment of the decorative string lights  10  could also be operated with a conventional battery or 12 volt DC power supply. This would be especially useful for mounting on vehicles where DC power is readily available and still yield the enhanced light projection and illumination provided by the inverted mount of the light emission devices or LED&#39;s  50 .  
         [0059]    The decorative string lights shown in the drawings and described in detail herein disclose arrangements of elements of particular construction and configuration for illustrating preferred embodiments of structure and method of operation of the present invention. It is to be understood, however, that elements of different construction and configuration and other arrangements thereof, other than those illustrated and described may be employed for providing decorative string lights in accordance with the spirit of this invention, and such changes, alternations and modifications as would occur to those skilled in the art are considered to be within the scope of this invention as broadly defined in the appended claims.