Abstract: A planar sample, particularly of the type used in biological laboratories for detection and sometimes analysis of two-dimensional arrays of proteins, nucleic acids, or other biological species, is illuminated by epi-illumination using optically filtered line lights that are arranged along opposing parallel sides of a rectangle in which the sample array resides, with two coaxial line lights on each side of the rectangle, and the two on any given side being separated by a gap whose optimal width depends on the wavelength band transmitted by the optical filter. Surprisingly, the gap eliminates the peak in intensity at the center of the sample area and the decrease that occurs from the center outward that would otherwise occur with a single continuous filtered line light, producing instead a substantially uniform intensity along the direction parallel to the line lights.

Abstract: The invention relates to an arrangement for light emission, comprising at least one LED illuminant in a long arrangement, a carrier element carrying the LED illuminant, and a light emitting element that can be connected to the carrier element. The light emitting element comprises a first region (41) wherein traversing light is extensively scattered. It also comprises a second region (40) wherein traversing light is scattered significantly less than in the first region.

Abstract: An electrical interface module (EIM) is provided between an LED illumination device and a light fixture. The EIM includes an arrangement of contacts that are adapted to be coupled to an LED illumination device and a second arrangement of contacts that are adapted to be coupled to the light fixture and may include a power converter. Additionally, an LED selection module may be included to selectively turn on or off LEDs. A communication port may be included to transmit information associated with the LED illumination device, such as identification, indication of lifetime, flux, etc. The lifetime of the LED illumination device may be measured and communicated, e.g., by an RF signal, IR signal, wired signal or by controlling the light output of the LED illumination device. An optic that is replaceably mounted to the LED illumination device may include, e.g., a flux sensor that is connected to the electrical interface.

Abstract: An improved lamp tube connector structure for light emitting diode (LED) lamp tube, in which the LED lamp tube comprises a lampshade, two lamp tube connectors installed on the left and right ends of the lampshade, at least an LED lamp strap installed inside the lampshade, and at least a drive circuit board installed inside the lamp tube connector and electrically connected to either side of the LED lamp strap. Herein the lamp tube connector is an end cap, with two electrode terminals extending outward from the end cap. Also, at least two connection lines extend from the drive circuit board, and the drive circuit board is inserted to the interior of the electrode terminal so as to form an electrically conductive contact with the electrode terminal for transferring electric power.

Abstract: In a sealed recessed lighting fixture having a housing forming a ceiling-alignment plane and a light-emitting opening, at least one elongate lamp mounted to and within the housing and defining a fixture direction, at least one reflector surface parallel to the fixture direction, and a lens, the improvement wherein the at least one reflector surface is/are part(s) of a unibody-reflector assembly which includes: (a) two reflector sections terminating in longitudinal inner edges forming a gap therebetween; (b) a distal edge perimetrically along the light-emitting opening of the housing; (c) a seal between the distal edge and the housing at the opening; (d) two opposed substantially parallel endwalls each having a lens-engaging proximal edge; (e) the lens being an elongate shaped member terminating at opposite lens ends, the lens enveloping the at least one lamp and being of substantially constant cross-section along its length, whereby the unibody-reflector assembly is removable from the housing as a single unit

Abstract: A flexible light transmitting device, comprising a printable layer, a backing layer, and a light-emitting diode strip disposed between the printable layer and the backing layer. The printable layer is translucent to permit transmission of light from the light-emitting diodes through the printable layer when the light-emitting diodes are activated; however, the LED strip remains hidden between the layers. The printable layer is adapted to receive printed indicia by way of thermal printing process. The backing layer is substantially opaque comprises a durable nylon webbing or polypropylene material. The embedded LED strip comprises an elongated flexible casing containing spaced apart light-emitting diodes, one or more light interrupting spacers, and at least one ribbon wire extending through the casing and electrically coupling said light-emitting diodes. The light-emitting diodes are electrically coupled to a switch assembly which provides the LED switch with a plurality of operative modes.

Abstract: An illuminator (1) an elongate inner housing (10) having a substrate (20) on which there is a linear array of light emitting diodes (24), wherein the diodes have sufficient power for illuminating objects at a distance of at least 1.5 m. A drive circuit (30, 31) is mounted in an upper compartment of an outer housing (2) at least partly surrounding the inner housing (10). There is a diffuser (22) over the diodes. There is a pair of side reflectors extending substantially parallel to an axis of the illuminator, being side walls (26) of the inner housing. The inner housing (10) is coupled to the outer housing (2) in a modular manner so that it is interchangeable. There is a series of reflector baffles (23) extending from a plane of the diodes at intervals along the length of the inner housing. The baffles (23) have textured surfaces and have a dimension normal to the substrate sufficient to act as visors to limit glare in the longitudinal direction.

Abstract: The invention relates to a lighting device for illumination in an aircraft cabin, having a U-section (1) made of aluminium, wherein the U-section (1) comprises two limbs (3) extending from an inner side of a section baseplate (2), wherein at least one circuit board (4) carrying a multiplicity of LEDs (5) is mounted on an outer side (A) of the section baseplate (2), opposite the inner side, in such a way that heat generated during operation of the LEDs (5) is at least partially dissipated via the U-section (1), and wherein a transparent cover (6) configured in the form of a further U-section, which permits an emission angle (?) of from 150° to 180° with respect to a section plane extending perpendicularly through the limbs (3) and the section baseplate (2), is applied on the U-section (1).

Abstract: The present invention provides a shell for a lighting device. The shell comprises a first lamp body, a second lamp body, a first connecting part, and a second connecting part. The ends of the second lamp body have a first end surface and a second end surface. The first connecting part lying along a first direction is set in the first end surface and threads through the first bottom surface. The second connecting part lying along a direction opposite to the first direction is set in the second end surface and threads through the second bottom surface. When the first lamp body is connected with the second lamp body, the two ends of the first lamp body are disposed extending over edges of the first end surface and the second end surface separately.

Abstract: A light source replacement for a fluorescent troffer light fixture utilizing light emitting diode and lens combination with the existing diffuser to produce lower contrast and evenly distributed illumination.

Abstract: A separate drive circuit structure for light emitting diode (LED) lamp tube, wherein the LED lamp tube comprises a lampshade and at least an LED lamp strap installed inside the lampshade, and the left and right sides of the LED lamp strap in the interior of the lampshade are respectively installed with a separate drive circuit structure. The separate drive circuit structures disposed at the two ends are connected with a transmission line such that the separate drive circuit structures disposed at the two ends together constitute a drive circuit capable of driving the LED lamp strap to illuminate. Moreover, the separate drive circuit structure can effectively reduce the tube diameter of the lampshade.

Abstract: A light system comprising an elongated housing; at least one LED light disposed inside of the housing. There can also be at least one lens disposed adjacent to the LED light, In addition, there can also be at least one reflector disposed in the housing, wherein the reflector has a first reflector section disposed adjacent to the LED light and a second reflector section coupled to the first section, and disposed at a distal end opposite the LED light. The first reflector section being substantially round in shape and said second reflector section being substantially round in shape.

Abstract: The present invention is related to a light-guiding element, a light-emitting diode (LED) lamp tube and an illumination lamp. The present invention utilizes a light-guiding element disposed on a light-emitting unit of the LED lamp tube. The light-guiding element includes a first surface and a second surface. The first surface is spaced with a plurality of reflecting units in a longitudinal direction thereof, and the second surface is partitioned with a reflecting area and non-reflecting areas corresponding to the reflecting units of the first surface. The light-emitting unit includes LEDs correspondingly attached to the non-reflecting areas of the second surface of the light-guiding element. An elongated light-emitting surface can be uniformly generated from the LED lamp tube by utilizing a destroyed total reflection phenomenon caused by lights in between the reflecting units of the first surface and the reflecting area of the second surface.

Abstract: A light kit comprises a clamp having a cap fitable over a top portion of a top tube. The top tube further has a bottom portion. A tee has a top portion in which the bottom portion of the top tube is fitable. The tee further has a side portion, and a bottom portion. An elbow is attachable to the side portion of the elbow. The elbow has a top portion. A light tube is attachable to the top portion of the elbow. The light tube is capable of fitting within a container, wherein the clamp is fitable to secure a container between the clamp and the top portion of the elbow.

Abstract: A light system for adapting the perimeter around an open space for accepting a light fixture comprising a first member for engagement with a portion of the perimeter around the space, a second member for engagement with a portion of the perimeter around the space such that the second member is located symmetrically opposite the first member with respect to the perimeter around the space, engaging the first member and the second member to the perimeter, a pivot for removably engaging the fixture to the first and second members such that the fixture pivots from a first position where the fixture fills the open space to a second position where the fixture is hanging from the perimeter, and a latch for securing the fixture in the first position.

Abstract: A light unit includes a bottom cover, a light source unit, an optical sheet unit on the bottom cover, and a reflective support member. The reflective support member includes a reflection plate for reflecting light and a guide pin for supporting the optical sheet unit in the bottom cover.

Abstract: An electroluminescent light assembly (56, 58) and assembly method for providing an object (e.g. a garment) with safety lighting. An electroluminescent light source (10) is fabricated as a laminated structure insertable into a protective sheath (40, 51) formed on or secured to the object.

Abstract: A lighting device includes a tube, an insulating body, a first circuit substrate and a plurality of first light emitting diodes. At least one portion of the tube is light-permeable. The insulating body is disposed in the tube, and has a first surface and a second surface which is opposite to the first surface. The first circuit substrate is disposed on the first surface. The first light emitting diodes are disposed on and electrically connected with the first circuit substrate.

Abstract: The present invention provides various embodiments for apparatuses and methods of manufacturing low profile housings for electronic and/or optoelectronic devices. Some embodiments provide low profile housings with a hollow casing comprising a first surface, second surface, and at least one lateral side surface. The housing is substantially light-diffusive. At least one cap is provided for sealing an end of the casing, with the at least one cap being sized to account for variations in the casing. At least one light emitting device, such as an LED, may be mounted within the casing. A mounting means may be included for mounting the housing. In another embodiment, a low profile housing with a first casing and second casing surrounding a majority of the first casing may be provided. At least one light emitting device, such as a double-sided printed circuit board with a plurality of LEDs, may be provided in the first casing.

Abstract: An LED track-lighting system includes an LED for emitting light. A light-transmitting element captures light emitted by the LED light and emits it over at least a portion of the track.

Abstract: An LED lamp tube with improved sealing and cooling performance includes a plastic tube shell, an LED lamp strip, a metal casing and two end caps. The plastic tube shell is elongate and includes a light condensing structure and a light reflection structure integrally formed by extrusion and an installation chamber formed between the light condensing structure and the light reflection structure. The LED lamp strip is held in the installation chamber and at one side of the light reflection structure. The metal casing is coupled on the outer side of the light reflection structure. Each of the end caps is coupled on each of two ends of the plastic tube shell, thus can achieve IP67 waterproof and dustproof level, and also can resolve cooling problem of the lamp tube.

Abstract: The present invention provides various embodiments for apparatuses and methods of manufacturing low profile housings for electronic and/or optoelectronic devices. Some embodiments provide low profile housings with a hollow casing comprising a first surface, second surface, and at least one lateral side surface. The housing is substantially light-diffusive. At least one cap is provided for sealing an end of the casing, with the at least one cap being sized to account for variations in the casing. At least one light emitting device, such as an LED, may be mounted within the casing. A mounting means may be included for mounting the housing to a mounting surface.

Abstract: A light emitting diode (LED) lamp includes a tube having a transparent first section and an opaque second section. An LED disposed inside of the tube. The second section is has an inner surface having a light diffusive surface so that the LED light is diffusively reflected. The LED is disposed so that a total amount of direct light from the LED to the first section is smaller than a total amount of indirect light that is incident on the first section as a result of being reflected by the second section (i.e., scattered or diffused light). The LED is disposed so that a light axis of the LED points toward the inner surface of the second section.

Abstract: A lighting device includes a tubular body and a substrate. The tubular body has a chamber, a first end and a second end. The first and second ends communicate with the chamber. The substrate is axially disposed in the chamber. Multiple light-emitting elements are arranged on the substrate. By means of the substrate, the projection range and projection angle of the lighting device are enlarged to enhance luminous efficiency of the lighting device.

Abstract: A generally U-section adapter profile extending along a longitudinal axis forms a longitudinally extending and transversely open cavity and has an outer surface formed with an array of at least three longitudinally extending and radially outwardly directed outer mounting formations radially spaced from the longitudinal axis and angularly spaced around the longitudinal axis. An elongated light emitter is provided in the cavity. A generally U-section mounting rail extending parallel to the axis opens radially toward the axis and has two side walls formed with inwardly directed and longitudinally extending inner mounting formations generally complementary to the outer formations and spaced so that the profile can be fitted to the rail in at least two different positions in each of which the two inner formations of the rail engage in two of the outer formations of the profile.

Abstract: The present disclosure is directed to inventive methods and apparatus for a lighting unit having a plurality of substantially linearly arranged solid state light sources (34, 134, 234, 334). A first reflector (40, 140, 240, 340) and a second reflector (50, 150, 250, 350) flank the solid state light sources (34, 134, 234, 334). A lens (60, 160, 260, 360) is provided over and spaced apart from a plurality of the solid state light sources (34, 134, 234, 334).

Abstract: Device including a tubular element (1), with a flexible printed circuit (3) of conducting tracks (32) on which are a number of LED diodes (31) and contact ports (33) for supply thereof; a flexible cover (2), formed by a coextruded profile with a diffuser back (21), configured in a flexible material and a base (22) made of a material of greater rigidity; said base includes a longitudinal aperture (23) and a set (25) of male and female configurations connectable by pressure for opening and closing the inner recess (24) for reception of the printed circuit (3); and an external connector (4), comprising two sets of electrically conducting connection pins (41a, 41b), or a holder (42c) with contacts (40) for the electric contact of the ports (33) and tracks (32), to terminals (45) for connection to the external supply.

Abstract: Both ends of a lamp body are mounted on sockets of an apparatus body and a feeding unit configured to feed power to LEDs is provided on the back side facing the apparatus body of the lamp body.

Abstract: A LED-based replacement light for a fluorescent socket is constructed such that an entirety of a radially outer portion of a tubular housing at least partially defined by a high-dielectric light transmitting portion is formed of a high-dielectric material. Forming a radially outer portion of the tubular housing of a high-dielectric material prevents a person handling the light from being shocked as a result of capacitive coupling occurring when the LED-based replacement light is installed one end at a time. A circuit board is in thermally conductive relation with the tubular housing, allowing for conduction of heat generated by the LEDs from a side of circuit board opposite the LEDs to the tubular housing for dissipation to the ambient environment.

Abstract: An optical touch module disposed on a reference plane and having a sensing area is provided. The optical touch module includes a first light sensing device and a light source module. The first light sensing device is disposed on a first side of the sensing area. The light source module includes a linear light source, a transparent plate and a reflecting device. The linear light source is disposed beside a second side of the sensing area to emit light to the sensing area. The transparent plate is disposed between the linear light source and the second side opposite to the first side. A part of the light is reflected by the transparent plate. Another part of the light passes through the transparent plate. The reflecting device is disposed beside a second surface of the transparent plate to reflect the light reflected from the transparent plate back to the transparent plate.

Abstract: A lighting device 12 of the present invention includes a light output portion 15z from which light is output, a light source 17, and an optical member 15b provided on the light output portion 15z side with respect to the light source 17. The optical member 15b is held by a pair of holding members. The holding members include a first holding member 15a that holds the optical member 15b from the light source 17 side and a second holding member 16 that holds the optical member 15b from an opposite side from the light source 17 side. A buffer 70 is provided in at least one of a space between the optical member 15b and the first holding member 15a and a space between the optical member 15b and the second holding member 16. The buffer 70 has at least one rough surface on a side that abuts the optical member 15b.

Abstract: A lighting fixture is presented comprising a plurality of modular apparatuses wherein each modular apparatus comprises one or more light sources and one or more light directing or light redirecting devices. Methods of adjusting one or more components of said lighting fixture about one, two, or three axes are presented whereby the lighting needs of a target area—even one of complex shape—may be addressed and in a manner that promotes compact fixture design with low effective projected area (EPA) without sacrificing transmission efficiency of the light sources.

Abstract: A filter for a fluorescent lighting tube. The filter includes a sheet of polymeric material having fold lines scribed thereon, defining a plurality of sections. The sections allow the filter to be positioned about and secured to a fluorescent tube without removal of the tube from its mounting fixture. The filter of the may be configured to filter color, ultraviolet light, or other wavelengths of the electromagnetic spectrum.

Abstract: An assembly structure for a LED lamp includes a cover plate, a LED module, fasteners and a mask. An inner surface of the cover plate is provided with a fixing portion. Both sides of the cover plate are formed with a slot respectively. The LED module has a substrate and a plurality of LED mounted on the substrate. The substrate is provided with an insertion hole. One end of the fastener is detachably connected into the insertion hole of the substrate and the other end thereof is fixed to the fixing portion. The mask is made of transparent materials and has an accommodating space for allowing the LED module to be disposed therein. Both sides of the mask defining the accommodating space are formed with a locking flange for inserting into the slot of the cover plate. With the above arrangement, the operator can assemble or detach the LED lamp quickly.

Abstract: An apparatus and associated method for operating a portable light assembly. In accordance with some embodiments, a frame providing a bridge and defining a transport region and a deployment region is slidingly connected to a mast. An arm is further connected to the mast by a hinge while a light fixture is connected to the arm. In various embodiments, the light fixture is capable of transitioning from a deployed position where the mast engages the deployment region and a transport position where the mast and light fixture are disposed within the transport region.

Abstract: A lamp 1 includes a semiconductor light-emitting element 12 as a light source, a circuit unit 40 that causes the semiconductor light-emitting element 12 to emit light, and an envelope 2 having an outer tube 30 and a base 60. The semiconductor light-emitting element 12 and the circuit unit 40 are housed in the envelope 2. The semiconductor light-emitting element 12 is disposed in a region at a side of an axially central section of the outer tube 30 facing the base 60 and oriented so that a main emission direction points away from the base 60. At least one component of the circuit unit 40 is disposed in a region at a side of the axially central section of the outer tube opposite the semiconductor light-emitting element 12. A light guide 50 that guides emission light of the semiconductor light-emitting element 12 along the axial direction is disposed between the at least one component of the circuit unit 40 and the semiconductor light-emitting element 12.

Abstract: An LED lamp tube with improved sealing and cooling performance includes a plastic tube shell, an LED lamp strip, a metal casing and two end caps. The plastic tube shell is elongate and includes a light condensing structure and a light reflection structure integrally formed by extrusion and an installation chamber formed between the light condensing structure and the light reflection structure. The LED lamp strip is held in the installation chamber and at one side of the light reflection structure. The metal casing is coupled on the outer side of the light reflection structure. Each of the end caps is coupled on each of two ends of the plastic tube shell, thus can achieve IP67 waterproof and dustproof level, and also can resolve cooling problem of the lamp tube.

Abstract: This invention provides a vapor-tight luminaire with a housing that defines a continuous and unbroken sealed tubular lens extending in a longitudinal direction. The housing includes a pair of end cap structures removably and sealably mounted on each of opposing respective housing ends. The housing removably supports a lamp assembly that can include various reflector arrangements. The lamp assembly can include fluorescent tubular lamps and can include electronics, such as a ballast circuit. Illustratively, a supporting rail suspended from each of the opposing housing ends by respective posts slidably supports the lamp assembly. In this manner each of the housing and the lamp assembly are constructed and arranged to allow the lamp assembly to be passed into and out of the housing along the supporting rail when at least one of the end cap structures is removed from the respective one of the housing ends.

Abstract: The LED tube for a lighting fixture has a transparent peripheral portion, internally disposed grooves for receiving an LED array board opposite the transparent portion and externally disposed longitudinally extending slots to slidably receive connectors for the mounting of the fixture. Multiple tubes can be grouped together in arrays of two or more without requiring different fixture enclosures.

Abstract: A fluorescent tube type LED lamp includes an elongated lamp body that has a largest dimension in a longitudinal direction, a light source substrate mounted on the lamp body, a light transmissive cover attached to the lamp body, and an LED unit mounted on the light source substrate such that the LED unit extends in the longitudinal direction of the lamp body. The LED unit includes a plurality of LED chips mounted on the light source substrate, and a transparent encapsulant encapsulating the LED chips. The encapsulant is molded such that the encapsulant is raised from the light source substrate. The LED unit radiates light from an entire surface of the encapsulant in an angular range including a region lateral to the lamp body.

Abstract: An LED retrofit tube that has an outer body that is substantially a lens so as to enable light generated by LEDs and light reflected therewithin to pass through substantially the entire tube. The tube includes an extrusion to support a circuit board having light emitting diodes (LEDs) mounted thereto. The extrusion is located substantially with the lens. The circuit boards may include LEDs mounted on both sides to provide primary lighting and secondary lighting (backlighting). The extrusion may include grooves to allow the backlighting to pass therethrough. Rotational endcaps include an inner portion and an outer portion that can rotate with respect to one another to enable the tube to be rotated and the light dispersed therefrom to be focused.

Abstract: Provided is an illumination device capable of providing uniform illumination along a specific direction. The illumination device is provided with a shaped member which extends in a specific direction, which has an opening section that opens towards a front side in a front/rear direction perpendicular to the specific direction, and which has a curved shape that protrudes towards a rear side; a base member which has translucent properties and is accommodated inside the shaped member while being exposed to the outer side of the shaped member via the opening section of the shaped member; a covering member which has light blocking properties and covers at least a portion of a front side portion of the base member from the front; and light emission means. The light emission means are fixed inside a recess section of the base member so as to be separated from each other in the specific direction.

Abstract: In an embodiment, a recessed light fixture includes a structural reflector and two end caps that form a light fixture housing. A first, second and third optics areas are provided. At least one first light source type is mounted near the first optics area. A second light source type is mounted near the second optics area and the second light source type is mounted near the third optics areas, the second light source type having a light output level substantially lower than the light output level of the first light source type. A diffuser is configured to sealably mount to the light fixture housing so as to substantially seal an interior portion of the light fixture. In operation, the light fixture can be switch between an ambient mode and an examination mode while providing a cost effective and attractive design.

Abstract: A linear light source device includes a light guiding member formed of a transparent body and an LED element arranged to face an end of the light guiding member. A plurality of recesses or projections are formed in a circumferential direction on the transparent body. Light from the LED element incident on the recesses or projections is reflected by the recesses or projections and travels toward the side of the light guiding member opposite to the recesses or projections to be emitted to the outside.

Abstract: A halogen light fixture for mounting under a cabinet and over a counter surface, as in a kitchen, has a housing between opposite end caps adaptable to fixtures of varying lengths. A partition between the end caps cooperates with a housing top and rear wall to provide a closed wiring compartment including a power switch accessible on a bottom of the partition. A translucent diffuser panel is supported in open slots formed in the end caps and can be pulled from the slots for access to the lamps sockets. The fixture is held together by screws passing through the housing and the end caps.

Abstract: In order to enable heat from luminous objects to be effectively radiated, and assembly to be simplified to facilitate downsizing and the like, a linear light irradiating device is configured such that a luminous object mounting board is contained in a bottom-equipped groove-like containing space in a body in a bending state of being elastically deformed, and also on the basis of an elastic restoring force of the board, a back surface of a luminous object mounting region in the board or vicinity of the back surface is pressed against and brought into close contact with a fore end surface of an intervening object that has thermal conductivity and is made to protrude from an inner circumferential surface of the containing space.

Abstract: Retrofit systems for replacing the outdated components of an existing light fixture. The retrofit systems may utilize the previously installed housing of the existing light fixture. The retrofit systems include brackets that are positioned on the ends of the housing. The positioning of the brackets is based off of the ceiling, t-grid, or the bottom of the housing. Lamp sockets with associated lamps, an optional ballast tray with associated ballast, reflector(s), lamps, and a shielding mechanism are all mounted on, and their position in the housing dictated by, the mounting brackets. Thus, regardless of the depth of the housing, the lamps are positioned a uniform distance from the ceiling opening to create consistent light distribution. Moreover, because these components are not directly attached to the housing, their dimensions need not precisely match those of the housing. Rather, the retrofit system can be installed in housings of varying sizes and shapes.

Abstract: Gradient optics for controllable light distribution for LED light sources. In an aspect, an apparatus is provided that includes a panel coupled to receive light emitted from a light source and gradient optics disposed on the panel. The gradient optics providing a transparency gradient that filters the light to achieve a selected emitted light intensity variation across a selected surface of the panel.

Abstract: Side light LED troffer tube. In an aspect, a side light LED tube is provided that includes a tube having at least one light receiving portion configured to receive light and gradient optics formed on the tube. The gradient optics providing a transparency gradient configured to distribute the light to achieve a selected emitted light intensity variation across a selected surface of the tube.

Abstract: An LED-based tube light suitable for replacing a conventional 48-inch fluorescent tube light includes LEDs connected into a complete illumination circuit that runs exclusively through connectors at one end of the light. In an alternative embodiment, two LED groups are used, each group being connected exclusively to its own set of end connectors.