Abstract: A light stick, primarily useful in the locomotive industry for signally between train personnel, includes a longitudinally extending housing which contains a first light source and a second light source. The first light source provides for general purpose illumination of the light stick. The second light source provides illumination primarily for purposes of signaling. The light stick may include a lens cap which is positioned at a forward end of the housing, and from which the illumination from the second light source may extend. Preferably, the light that is emitted from the lens cap has a blue color for purposes of railroad signaling.

Abstract: Elongated lighting fixtures intended to be incorporated into thin architectural surfaces, interconnected and configurable as a continuous run with potential to follow the direction of adjacent planar surface in three dimensional spaces while maintaining the structural integrity of the supporting framework.

Abstract: A luminaire (41, 141) for a double ended tubular HID lamp (110) is disclosed. The luminaire has a V-shaped reflector (2) having a spine (3) and is bendable into a tensioned state having a generally M-shaped configuration. A pair of lamp holders (60, 61; 160, 161) is connected to the spine and spaced apart a distance corresponding to the length of the tubular lamp. A hollow conduit (43, 158) extends between the lamp holders. A pair of insulated cables (31, 32) interconnects the lamp holders with one of the cables (32) passing through the hollow conduit. The distance between the spine (3) and lamp (110) is able to be adjusted.

Abstract: The invention provides a Light-Emitting Diode (LED) display screen, including: fixing assemblies and a display assembly. The fixing assemblies are provided at an upper side and lower side of the display assembly so as to fix the display assembly. The display assembly includes: an LED display light bar and a connecting structure connected with the LED display light bar. The display assembly further includes an angle adjustment structure provided between the connecting structure and the LED display light bar. The angle adjustment structure can adjust a mounting angle of the LED display light bar. The technical solution of the invention effectively solves the problem in the traditional art that an angle of an LED display light bar cannot be adjusted.

Abstract: A light distribution device includes a light transmissive substrate having first and second opposing faces and a plurality of substantially parallel linear prisms on the second face that extend in a longitudinal direction of the substrate. The light distribution device is configured to connect to a light assembly including a linear light source with the first face of the substrate facing the light source, with the linear prisms substantially parallel to a light source longitudinal axis and with and the substrate having a non-planar cross-sectional shape such that at least a major portion of the substrate is concave relative to the light source. When connected, the light distribution device is configured to receive light from the light source and distribute the light emerging from the second face of the substrate in a batwing distribution pattern in a plane perpendicular to the light source longitudinal axis.

Abstract: A lighting apparatus includes: a plurality of light sources; a first frame including a first reflection surface disposed inside of the light sources, the first reflection surface reflecting, in a forward direction, light emitted from the light sources; a second frame including a visor portion covering fronts of the light sources; and a diffuser disposed in front of a front surface of the visor portion with a distance left between the diffuser and at least a part of the front surface of the visor portion.

Abstract: A vehicle lamp includes a light source including a semiconductor light emitting device, and a metal support member on which the light source is mounted. The support member is integrally formed with a shade portion configured to block a portion of light emitted from the semiconductor light emitting device.

Abstract: A display module includes a display panel configured to display an image on a display surface, a frame having a shape configured to surround an outer edge of the display panel and having an opening formed in a region overlapping the display surface, and a holding member having an inner region that is a region closer to a center of the display panel and an outer region that is a region farther from the center of the display panel, the inner region being connected to the display panel, the outer region being connected to the frame, and the inner region being separated from the outer region in a view projected from a direction orthogonal to the display surface.

Abstract: A direct type backlight module includes an optical film unit and a light emitting unit. The light emitting unit includes a laser sources, transreflective components, reflective components, and phosphors. Each laser source corresponds to a number of the transreflective components and one of the reflective components arranged at an optical path of a laser beam emitted from the laser source in sequence. The transreflective component transmits part of the irradiated laser beam and reflects the other part of the laser beam. The reflective component reflects the irradiated laser beam. The phosphors correspond to the transreflective components and the reflective components one-to-one and emit out white light when irradiated by the laser beam reflected by the transreflective components and the reflective components. The white light transmits through the optical film unit.

Abstract: A backlight (10) includes a front and back reflectors (12,14) forming a light recycling cavity (16) and one or more light source members (24a, 24b, 24c) disposed to emit light into the light recycling cavity. The front reflector (12) being partially reflective to provide an output illumination area. The front reflector (12) has a blue sloped transmission spectra, at normal incidence with a range among bin values from 15% to 100%.

Abstract: The present invention relates to a reflection plate for a backlight unit in a liquid crystal display device, and more particularly, to a reflection plate for a backlight unit in a liquid crystal display device, which is made of a thermoplastic thermal conductive resin composition having a thermal conductivity of at least 0.35 W/mK, thereby effectively solving the thermal problem of the backlight unit, and having excellent properties such as shock resistance, heat resistance, mechanical strength, and the like, as well as having excellent reflectivity, thereby improving the durability of the liquid crystal display device.

Abstract: A light emitting diode (LED) lamp structure (100) of the present invention includes a housing body (102), a LED lamp module (500), and an electronic module (700, 700?). The housing body (102) includes a lamp base (200), a module base (400), a connecting ring (300) connecting the lamp base (200), and at least one clasping member (104) connecting the module base (400). The LED lamp module (500) connects the connecting ring (300) and is disposed on the lamp base (200). The electronic module (700, 700?) connects the clasping member (104) and is disposed on the module base (400). Thereby, assembling, disassembling and replacing can be achieved without any tools. Meanwhile, the entrance of moisture is also prevented, so that a life span of an electronic device is prolonged.

Abstract: A retrofit-style lamp is disclosed. The retrofit-style lamp includes a plurality of light sources, and a one-dimensional linear batwing lens. The one-dimensional linear batwing lens beam shapes light emitted by at least two light sources of the plurality of light sources. The retrofit-style lamp also includes a housing including the plurality of light sources, and attached to the one-dimensional linear batwing lens. The combination of housing and lens is then itself fitted with endcaps, including electrical connectors, for placement within a fixture, such as within an existing conventional fluorescent tube fixture located within a storage structure, for example a refrigeration case. Alternatively, the plurality of light sources, the one-dimensional linear batwing lens, and the housing may be formed, along with a power supply, as a standalone retrofit fixture for use in enclosed storage structures, such as refrigeration cases, where the retrofit fixture replaces a conventional fluorescent fixture.

Abstract: An LED tube has a tube body, an LED light board and two caps. The tube body has a translucent tube shell and a heat dissipating seat. The translucent tube shell has two openings and a gap. The heat dissipating seat is mounted in the gap. The LED light board is mounted in the tube body and has a luminous surface, wherein two opposite ends of the LED light board extend out of the heat dissipating seat. The luminous surface has four electrical connecting parts, wherein each two electrical connecting parts are respectively mounted near a corresponding one of the two opposite ends, thus, the four electrical connecting parts are mounted away from the heat dissipating seat to extend internal creepage distances between the four electrical connecting parts and the heat dissipating seat, and further increase electrical safety of the LED tube.

Abstract: An information handling system provides connectors along a housing periphery with a reduced vertical footprint by adjusting a display circuit portion relative to a display panel portion to provide vertical space for the connectors. For example, the circuit portion aligns with the display panel portion along one side of the display to provide space for connectors at that side of the display, and the circuit portion extends past the perimeter of the display panel portion at an opposing side of the display. In one embodiment, the circuit portion extending outside the perimeter of the display panel portion includes circuits for powering a backlight disposed in the circuit portion.

Abstract: A linear LED system including a plurality of line light modules, each line light module comprising an extruded light module housing profile that extends along an axis and that has a profile wall defining an inner profile contour and an outer profile contour and of which a cross sectional view along a plane that is perpendicular to the axis is closed, wherein the profile wall in the cross sectional view defines a LED chamber. At least one LED-strip including a plurality of LEDs is accommodated in an associated LED chamber. The system further includes a plurality of interface modules, each interface module that connect the housing profiles and that an inner space in which at least one power supply module is accommodated so that the power supply module and any other electronic controller equipment is not, or at least to a lesser extend exposed to heat dissipated by the LEDs.

Abstract: A backlight assembly includes a first light source part including a plurality of light sources and extending in a first direction, a second light source part including a plurality of light sources, wherein the second light source part is spaced apart from and in parallel with the first light source part, and a driving part disposed between the first light source part and the second light source part. The driving part is connected to the first and second light source parts, and is configured to drive the light sources of the first and second light source parts.

Abstract: A lamp with uniform illumination pattern is used for continually illuminating an illuminated area and includes at least one light module. The at least one light module includes two light sources respectively having different light intensity and arranged orderly. Two extension lines of two optical axes of the two light sources have one crossover point. Light emitted from the light source with less light intensity illuminates the illuminated area which is closer to the light module, while light emitted from the light source with greater light intensity illuminates the illuminated area which is farther to the light module. Light emitted from the light source, which is father to the illuminated are, can make up the intensity losses of attenuation since light emitted from the light source which is father to the illuminated area have greater light intensity. As a result, the lamp has uniform illumination pattern.

Abstract: A luminaire includes a fixture, a light engine, and a heat flange. The fixture is configured to be received in a recess of a support surface and defines a cavity having a radius R. The light engine is disposed within the cavity and includes at least one light source. The heat flange is disposed about a distal end region of the fixture and includes a hollow, generally conical frustum shape extending radially outwardly from the fixture and extending away from the distal end region of the fixture. A distal-most end of the heat flange is configured to be disposed a distance D from the support surface when the fixture is received in the recess, the distance D being greater than or equal to 0.4R. Thermal energy is conductively transferred from the light engine, through the fixture, to the heat flange where the thermal energy is convectively transferred from the heat flange to surrounding air to create air currents flowing along the support surface thereby reducing the junction temperature.

Abstract: A lighting arrangement is provided on each corner of the housing of a ventilation arrangement. Each lighting arrangement comprises a profiled rod of acrylic material with a plurality of LED's shining downwardly into an upper end of the rod, with light being reflected outwardly, and particularly by bubbles within the rod. A reflective plate is provided at a lower end of the rod to reflect light back up the rod.

Abstract: A linear light-emitting diode (LED) tube lamp having a readily retrofittable modular structure enables consumers or manufacturers to readily retrofit the lamp by replacing an LED module or internal electronic control units that include an LED driver in maintenance or lamp upgrade without hazards. The readily retrofittable modular structure includes a core assembly in each of lamp bases for easily securing or removing the electronic control unit through a mechanical securing means, and two sets of connection modules for quickly connecting and disconnecting the electronic control unit with the LED module. The readily retrofittable modular structure may use one bi-pin or two bi-pins to connect to the AC mains via pluggable wire for delivering power to the LEDs. Thus, the LLT lamp using the readily retrofittable modular structure may be configured as single-ended, double-ended, or double-ended with double shock-protection switches and can be cost-effectively retrofitted after initial installation.

Abstract: An LED lamp retrofit system, kit, and method is presently disclosed. The LED retrofit system comprises at least one longitudinally extending LED lamp having a length substantially greater than a width and open longitudinal ends. A first LED lamp support rail holds and covers a first open longitudinal end of each of the at least one longitudinally extending LED lamps and is configured to electrically connect each of the at least one longitudinally extending LED lamps to a power source. A second LED lamp support rail holds and covers a second open longitudinal end of each of the at least one longitudinally extending LED lamps held with the first LED lamp support rail. A system holder on each of the first and second LED lamp support rails is configured and disposed to hold the retrofit system to a portion of a lamp fixture being retrofitted.

Abstract: A light-emitting diode (LED) troffer adopts LED light sources mounted along two lengthwise sides of an LED module that uses a reflecting diffuser and a diffused light exit window to sufficiently average white light emissions from a plurality of LEDs or to properly mix light emissions from white LEDs at correlated color temperature (CCT) of 6,200±300 K with emissions from LEDs having saturated colors for uniform and tunable CCT light outputs having a consistent intensity or color hue within viewing angles. The troffer adopting a retrofittable design enables single person to readily hang and secure the LED module single-ended on top of the troffer for installation, retrofit, and inspection. The troffer uses such an integrated LED module with a power density less than 0.0127 W/cm2, and thus no apparent heat sink is needed.

Abstract: A linear lamp having a longitudinal bulb, in particular a glass bulb, wherein at least one socket is provided for electrical contacting and mounting of the linear lamp, and wherein at least one light-emitting diode is disposed in the bulb as a luminous element.

Abstract: Embodiments of the invention provide for a lighting system for illuminating aisles with shelving. A rail can include a plurality of LEDs that extend along the length of the rail. The rail can be coupled with a node that includes various components along with an egress light source. The LEDs can be used to primarily illuminate the shelving on both or one side of the aisle. The egress light can be used to illuminate the aisle during times of emergency, at night, or when egress may be required.

Abstract: The invention relates to LED light panel adapted for use with a troffer style light fixture. The invention is also directed to a LED light retrofit kit to convert or replace existing troffer style light fixtures. The lighting panel includes a base member. The base member includes a first layer that is made up of a heat conductive material with a sufficient thermal conductivity to adequately dissipate heat generated by the lighting elements discussed below. The base member may also include a second layer that may provide structural support. A third layer base plate may also be included which may comprise an aluminum or copper sheet or other lightweight structurally strong heat conductive material. A power supply, which is connected to an energy source is provided and supplies electricity to at least one strip of LED lights, which are mounted with the first layer of the base member.

Abstract: A LED light source, comprising a heat-dissipation base, a circuit base is fixed on the heat-dissipation base, and luminous LED(s) is fixed on the circuit base, a light-distribution lens is sealed connected outside the heat-dissipation base, a housing is fixed outside the light-distribution lens, and front ends of the housing and the light-distribution lens are separately fixed jointed to a light-transmitting cover, the light-transmitting cover is sealed connection with the heat-dissipation base, the circuit base and LEDs are located within a sealed first chamber formed by the heat-dissipation base, light-distribution lens and light-transmitting cover, at least a channel is further arranged on the heat-dissipation base, each channel is disconnected to the first chamber, and two opposite openings of each channel are connected to the exterior. The LED light source has a good heat-dissipation performance, particularly to be used for high-power LED illumination.

Abstract: Disclosed is an LED bar. The LED bar has a plurality of LED units mounted in a cuttable form and each of the LED units has a single LED. The LED bar includes a plurality of LEDs; a bar-shaped base substrate on which the plurality of LEDs are mounted; a plurality of resistors mounted on the base substrate so as to respectively correspond to the plurality of LEDs; and a link formed so that an LED unit formed with one of the plurality of resistors corresponding to the one LED is distinguished from other LED unit that is adjacent to the LED unit.

Abstract: Implementations of the present invention relate to a rotatable and/or slidable lighting module. The lighting module can have a lighting fixture assembly that is optionally capable of rotating with respect to a support base to allow the lighting fixture assembly to project light on a desired surface or area. The lighting fixture assembly can also slide or move relative to the support base to allow the position of the lighting fixture to be selectively varied.

Abstract: An LED lighting device may include an LED support, which is populated with at least one LED on a front side thereof and a rear side of which is fastened to a rest. The front side of the LED support may be overarched by an electrically insulating, light-permeable and diffusely scattering LED cover, and the LED cover may be overarched by a protection cover resting on the support.

Abstract: A mounting bracket for a linear LED tube-type light to be installed principally inside of display cases, shelves and soffits. In one embodiment, a cylindrical bracket is mounted to each side of a display case and an LED tube light (a semi-cylinder with mounted LED circuit boards) is inserted into these brackets and secured with a set screw. This bracket/tube system allows for power harness wiring through either side of the case or through a down rod at various positions to the bracket. Additional embodiments allow for mounting said brackets to the underside of the case glass or side walls using adhesive. Further embodiments incorporate this same cylindrical bracket design to mount the LED light tube to the front edge of shelves or on to a flat pedestal for mounting to a variety of flat surfaces such as a wall or ledge. Additional related embodiments are described and shown herein.

Abstract: A lamp housing uses a tubular metal support functional as a heat radiator within which is an electrical circuit board having a component mounting surface, and in opposition thereto, a thermal transfer surface positioned for conducting heat, from the circuit board to the metal support. A clear lens is secured to the metal support, and a pair of ribs integral to the clear lens extend into contact with the component mounting surface of the circuit board thereby urging the thermal transfer surface toward the metal support for good thermal contact and heat transfer. A thermal transfer tape or paste may be used between the circuit board and the metal support surface upon which it rests. The circuit board may be laid onto the metal support without sliding it into grooves and the clear lens may be snapped into place over the circuit board engaging grooves in the metal support.

Abstract: A linear light assembly having an elongate tray and a plurality of moveable lighting packages. The elongate tray may provide both mechanical support and thermal management for the plurality of moveable lighting packages. The elongate tray may comprise a medial channel portion with a planar track member and two opposing rim members projecting perpendicularly outward therefrom. Each flange portion may have a U-shaped cross-section. Each moveable package may comprise an assembly tray and an optical assembly having at least one light-emitting device (LED). Each moveable lighting package may be adjustably positioned along and independently removed from the front side of the track member of the elongate tray. Any segmentation of the elongate tray may be characterized by a heat dissipation rate not less than a combined heat generation rate of all moveable lighting packages carried by the segment. A method aspect includes installation of the linear light assembly.

Abstract: A lighting device comprises a housing; a coupling member coupled to the housing, comprising a first outer surface and a second outer surface, and having an insertion recess disposed between the first outer surface and the second outer surface; a first reflector disposed between the first outer surface of the coupling member and the housing; a second reflector disposed between the second outer surface of coupling member and the housing; and a light source unit comprising a first body and a second body, wherein the first body comprises a first coupling unit coupled to a first inner surface of the insertion recess and a first light emitting device emitting lights to the first reflector, wherein the second body comprises a second coupling unit coupled to a second inner surface of the insertion recess and a second light emitting device emitting lights to the second reflector.

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 invention provides an elongated lighting fixture with multiple light emitting diodes (LEDs) arrayed in two groups that are angled to each other. The fixture includes an elongated housing having a pair of side walls with at least one fin to dissipate heat. Each side wall has a support member extending upward at angle from the side wall. A generally transparent cover is connected to the housing and extends between opposed ends of the housing. A first group of LEDs and a second group of LEDs are mounted to the first support member and the second support member, respectively. First and second interconnection board assemblies are affixed to respective support members beneath the group of LEDs. When the first and second interconnection board assemblies are energized by an internal power source, current travels from each interconnection assembly through fasteners to each group of LEDs for illumination.

Abstract: The invention relates to an arrangement for generating light effects, particularly for decorative purposes, having a light source (10) and a textile web material (12) that can be illuminated by through light from the light source (10) toward a visible side (16) or by incident light. According to the invention, the textile web material (12) comprises a two-layer weave structure made of warp threads (18) forming a warp thread layer (26) and weft threads (20) forming a weft thread layer (24) contacting the warp thread layer (26) on one side.

Abstract: Devices, systems, and methods are provided for achieving desirable light distributions. In one exemplary embodiment, the light module includes a body having a pair of opposed complex parabolic bodies, an LED light source, and an inner reflective surface. The light source can be configured to provide for a desired light distribution, such as a bat wing light distribution. The provided light distribution can be such that it is not the result of passing light through a secondary optics component. Thus, while in some embodiments the LED module can include a glare reduction lens disposed over at least part of the LED light source, the lens may not affect the resulting light distribution configuration. Exemplary configurations of other systems, devices, kits, and methods associated with the teachings are also provided.

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.

Abstract: A lighting fixture comprising an optimized linear module lighting device and a plurality of parabolic fins. The optimized linear module lighting device comprises a substrate comprising at least first, second, and third portions. The optimized linear module lighting device further comprises a plurality of light-emitting elements. A first set of the light-emitting elements are disposed on the first portion of the substrate; a second set of the light-emitting elements are disposed on the second portion of the substrate; and a third set of the light-emitting elements are disposed on the third portion of the substrate. The second set of light-emitting elements is disposed above at least one of the parabolic fins and is less dense than the first and third sets of light-emitting elements.

Abstract: A modular power-delivery system comprises at least one power link, at least one power strip, and at least one power supply connector interconnected with a power source to deliver electrical power to one or more electrical components, including articles and objects that may be separately illuminated, operated, or controlled.

Abstract: Light emitter components, systems, and related methods having improved optical efficiency and a lower manufacturing cost are disclosed. In one aspect, a light emitter component can include a substrate having an elongated body and first and second ends. At least a first trace and a second trace can be provided on the substrate. In some aspects, the first trace can be disposed proximate the first end of the substrate and the second trace can be disposed proximate the second end of the substrate, with no other portion of the first trace or second trace being disposed between the first and second ends of the substrate. In some aspects, a string of LED chips can be provided on the substrate. The string of LED chips can be disposed between the first and second ends of the substrate. Angled traces, gaps and light emitter components can also be provided in some aspects.

Abstract: An indirect troffer. Embodiments of the present invention provide a troffer-style fixture that is particularly well-suited for use with solid state light sources, such as LEDs. The troffer comprises light bars mounted proximate to a back reflector. A back reflector defines a reflective interior surface of the lighting troffer. To facilitate thermal dissipation, the light bar can act as a heat sink. A portion of the heat sink is exposed to the ambient room environment while another portion functions as a mount surface for the light sources that faces the back reflector. One or more light sources disposed along the light bar mount surface emit light into an interior cavity where it can be mixed and/or shaped prior to emission. In some embodiments, one or more lens plates extend from the light bar out to the back reflector.

Abstract: The invention relates to an elongated luminous element (1) having a plurality of approximately point-shaped light sources (2) disposed along a line and having light diffusion means (3) deflecting at least one part of the light rays (12) sent out by the light sources (2) in a desired direction. The light diffusion means (3) are disposed lateral to the main emitting direction of the light sources. The elongated luminous element (1) is particularly suitable for installation in a light box (13) for advertising or demonstration purposes. The light box has a transparent or partially transparent front side (7) and a reflective back side (8). The elongated luminous element (1) or a plurality thereof is or are applied to at least one of the side areas (11, 14), such that the light rays (12) emitted by the light sources (2) and deflected by the light diffusing means (3) are aimed between or on the back side (8) and/or the front side (7) of the light box (13).

Abstract: This invention relates to lighting apparatuses, and more particularly to a lighting apparatus in which an LED module is detachably mounted to make replacement and repair easy, and which enables to mount the same to fit to different sizes of spaces by a combination of assembly of a plurality of LED modules.

Abstract: A light device includes housing-units and joints-that can change orientation, position, viewing angle, or other properties to allow the light device to emit light beams in a desired direction.

Abstract: The exemplary lamp devices have polygon lamp devices, polygon-round lamp devices and round lamp devices which can be used indoor and outdoor for illumination of a surrounding area.

Abstract: A holder element for holding at least one flat surface-light lamp includes: an elongate, flat plate body having an upper plate side and a lower plate side arranged opposite the upper plate side, and one or more lampholders, which can be fitted on the plate body, for mechanically holding and making electrical contact with a flat surface-light lamp, wherein an engagement portion is formed on each of the two longitudinal ends of the plate body and is formed by a cutout, which extends, in plan view, from the respective longitudinal end of the plate body over the entire width of the plate body in the direction toward the longitudinal center, such that the plate body can be connected at each of its two longitudinal ends to another, identically formed plate body so as to form a form-fitting connection formed by the engagement portions of the adjacent plate bodies.

Abstract: A housing once included a high intensity discharge (HID) light source, lens, and fixture chamber between the housing and lens. The housing is retrofit to exclude a routinely functioning HID light source and exclude at least a portion of the HID lens. The housing is made to include at least a first support for at least one light emitting diode (LED) light source and an LED diode lighting fixture chamber. A second support is affixed at least to the first support and is positioned at least in part outside the LED fixture chamber. The LED light source is mounted to the second support outside the LED fixture chamber. At least one LED light source lens is mounted to provide a lens for the LED light source, also outside the LED lighting fixture chamber. The LED light source is thereby substantially free of exposure to the temperature effects.

Abstract: An LED lighting device at least comprises a base made of metal materials; a substrate which is disposed on a surface of the base and has one electrode and at least one LED chip; and an insulation sheet which is disposed between the base and the substrate. The insulation sheet and the substrate satisfy the correlations L2+2×T?L1+2×Cr, W2+2×T?W1+2×Cr and Cr?1.6 mm. By controlling the dimension of the insulation sheet, a creepage distance between the electrode and the base can be increased, so as to solve the safety problem of lighting devices without increasing manufacturing costs.