Abstract: An auxiliary light mounting assembly for a light device is provided. A cylindrical mounting member receives the light device within a front end. A mounting strap secures the mounting assembly to a tubular structure. Spherical recesses are provided on a rear end of the cylindrical mounting member in order to accommodate the tubular structure. The mounting assembly protects the light device from debris.

Abstract: A light assembly, kit, and method for suspending a light from a structure to illuminate a space. The light assembly comprising: a ball mount having a first internally threaded opening; a hanger bracket having a seat; a downrod including opposing first and second ends, with the first end having a first externally threaded portion that is threaded into the first internally threaded opening; a light mounted to the second end of the downrod; a canopy fastener having a second internally threaded opening that is threaded onto the first externally threaded portion and a second externally threaded portion; and a canopy having a third internally threaded opening threaded onto the second externally threaded portion.

Abstract: A lighting-junction-box-assembly-for-remodel (assembly) has a lighting-junction-box, leg-springs attached to the lighting-junction-box, and mounting-tabs attached to the lighting-junction-box. The leg-springs are used to (temporarily) hold (by friction) the assembly within a hole in an existing ceiling, sized to fit the assembly. While the leg-springs are (temporarily) holding the assembly within the hole in the existing ceiling, other/different holes within extension-portions of the mounting-tabs are used to secure the entire assembly to the existing ceiling, via mechanical fasteners passing through the extension-portion holes and into the existing ceiling. An existing ceiling may be retrofitted with this assembly to have a lighting-junction-box where desired/needed in that existing ceiling; and as such, this assembly is particularly useful in remodeling situations (applications); however, the assembly may also be used in new construction.

Abstract: A device is configured to be mounted to a planar mounting panel, including, for example, a wall or ceiling of a home or other building. The device includes a housing, a fastener, a dogleg tab and a friction inducing member. The housing is configured to be received in an aperture in the mounting panel and includes a housing aperture. The fastener is disposed in the housing aperture. The dogleg tab is operatively coupled to one end of the fastener. The dogleg tab is configured to be disposed in a retracted position and to be disposed in an engagement position, in which engagement position the dogleg tab is disposed to engage an inside surface of the mounting panel. The friction inducing member is fixedly attached to the housing adjacent the housing aperture and friction-fit to the fastener.

Abstract: The present invention generally relates to the field of a lighting unit (100), and in particular to a lighting unit (100) that is suitable for being part of a suspended ceiling (0001). The lighting unit (100) comprises one or more lighting tiles (1000) and an interface component (2000). The interface component (2000) forms at least a portion of a grid system (1020) for the suspended ceiling (0001) and for supporting the lighting tile (1000). The interface component (2000) comprises a central support portion (2001) having a first end (2002) facing a ceiling (0002), and a second end (2003) having a first flange (2004) and a second flange (2005) that are opposing each other.

Abstract: A lighting system for a ceiling grid system may provide lighting at a location below the ceiling grid system. The light fixture includes a light source and a support member, and the light fixture may provide diffusely reflected light to a ceiling grid opening. The light fixture may include a wall assembly that is adapted to be moved between a folded configuration and an unfolded configuration.

Abstract: This application discusses components that can be used to prevent flame or hot gas transmission from the inside of a luminaire enclosure to the outside of a luminaire enclosure due to an internal explosion, thereby yielding an explosion encapsulating luminaire enclosure. Accordingly, the components and assemblies described herein can be safely integrated with systems that operate in the presence explosive gas.

Abstract: A double-layer blade ceiling fan capable of adjusting the arrangement of blades includes a motor and at least two blades. The motor has a stationary part and two rotating parts. The rotating parts are spaced apart from the stationary part. The rotating parts each have a plurality of mounting portions that are arranged around a central axis of the motor. The stationary part has an upper connecting portion and a lower connecting portion. The mounting portion is configured for connection of one of the blades. At least one of the blades is fixed to each of the rotating parts. The blades mounted to the rotating parts are selectively arranged in a same or different pattern for regulating air flow. When the blades and the rotating parts are rotated, the upper connecting portion and the lower connecting portion are not affected.

Abstract: A system or appliance for universal mounting of an audio/visual alert system, with a surface interface, having a mounting body mountable on either of a vertical surface or a horizontal surface and one or more electrical terminals. Further having a notification module with a lens configured to throw light 180 degrees vertically and 180 degrees horizontally at greater than 15 cd and a speaker. Further having an appliance cover with a cover body, a letterplate having a first side with a text in a first orientation and a second side with the text in a second orientation, wherein the letterplate is fully separable from the rest of the system; and a grill having a flat outer face.

Abstract: A polymer luminaire including a polymer housing having a longitudinal axis. An electrical board is mounted to an inner surface of the housing. The electrical board has an outer surface defining a plane extending at an angle to horizontal when the longitudinal axis of the housing is oriented parallel to horizontal. A light source is mounted to the electrical board and electrically connected to the electrical board for emitting light from the housing.

Abstract: A frame assembly for a recessed luminaire. The frame assembly has a planar platform with a sheetrock side and an exposed side opposing the sheet rock side. The planar platform defines a central aperture for receiving the recessed luminaire, and a plurality of perforations disposed around the central aperture, the perforations configured for receiving construction compound. The frame assembly has at least two barbs configured for bending out of a plane of the platform for insertion into sheetrock. Each barb has a barb base extending away from the exposed side of the planar platform at a 45 degree angle. Each barb has a barbed shank region extending towards the sheet rock side at a 90 degree angle with respect to the barb base so that the barbed shank region is configured to be secured into sheetrock when the sheetrock side of the platform is against sheetrock.

Abstract: A modular mud-in channel lighting system includes a modular channel and a modular connection box that is removably attached to the modular channel itself. Because the modular connection box is removably attached to the modular channel, a modular mud-in channel lighting system enables the creative installation of lighting solutions in a manner that is not constrained by framing or the location of pre-existing junction boxes. Further, a modular mud-in channel lighting system may be disposed at creative angles that are not limited to locations near to pre-existing junction boxes. As such, a modular mud-in channel lighting system is suitable for new construction as well as retrofits and remodels of existing construction and enables the installation of creative lighting solutions at aesthetic angles that are not possible with the limitations of conventional lighting solutions.

Abstract: Embodiments are directed to a substantially linear luminaire assembly which includes an elongated translucent or transparent housing, where the housing comprises a first end and a second end. One or more light sources may be at least partially enclosed by the elongated housing. A detachable lens assembly may be affixed at or near at least one of the first end and the second end. The detachable lens assembly may include one or more lenses improve a uniformity of light ray distribution of light rays emitted by the one or more light sources.

Abstract: A light fixture a rectangular acoustic panel configured to be attached to a T-bar, and a frame with light sources configured to be placed around the acoustic panel, such that the light sources emit light from all four sides of the acoustic panel.

Abstract: An industrial and mining lamp that can be rotated and adjusted from multiple angles is provided. Which includes a lamp frame and two sets of lamps provided on two transverse sides of the lamp frame and symmetrically distributed along an axis of the lamp frame. Two longitudinal sides of the lamp frame are provided an end cover, the two sets of lamps are respectively connected to the end cover through a rotating component along two longitudinal ends. The rotating component includes a screw, a limit ring, an iron ring, and a connector, the iron ring extends towards a circular groove direction and is provided with a toggle hook matching a convex bar, the rotating component in the present disclosure connects the end cover and the lamp. The rotating component can rotate the lamp from multi angle and achieve lighting in multi angle.

Abstract: An optical system and luminaire are provided. The optical system includes first and second lighting effect assemblies. Each lighting effect assemblies include an effect selector and a lighting effect insert rotatably coupled thereto. Each effect selector positions its lighting effect insert in a light beam. The lighting effect inserts include a prism with a rear surface and a front side having a first plurality of facets. The rear surface has a plurality of regions aligned with corresponding facets. The regions are color filters. Some lighting effect inserts are an effects plate and a prism, where the effects plate has color filter regions. The effects plate and the prism may be separately rotatable at desired speeds and/or directions. Some lighting effect inserts are a prism with color filter regions on the facets.

Abstract: Systems, methods, and apparatuses are provided for a quick mount apparatus. The quick mount apparatus includes a mount plate with one or more engaging mechanisms for coupling the mount plate to a mountable device. The quick mount apparatus further includes a first terminal block having extending therefrom building wiring that is fed through a first pass through mechanism of the quick mount apparatus. The first terminal block is electrically couplable with a second terminal block of the mountable device.

Abstract: A dual plated magnetic plate mount comprising magnets, bolts, screws, and related hardware is disclosed herein. A magnetic cap and puck ceiling or wall mount for the consolidation or management of loose wires is also disclosed herein. The dual plated mount and magnetic cap and puck embodiments disclosed herein may be advantageously used to mount a projector to a wall or ceiling.

Abstract: A system intended to be used for lighting purposes of an environment, where a light measurement at a wavelength is performed, is also desired to be monitored, without affecting the measurement performed in a dark environment.

Abstract: A track lighting is provided, which mainly includes a track structure and a light source installation base. The track structure includes an installation base, a first lateral wall and a second lateral wall circuitously extending from the two sides of the installation base respectively. The first locking portion at one end of the first lateral wall is engaged with the first buckle portion of the light source installation base, and the second locking portion at one end of the second lateral wall is engaged with the second buckle portion of the light source installation base. Besides, after the stopper structure of the light source installation base is inserted into the stopper space between the stopper element and the corresponding stopper portion of the second lateral wall, the stopper element and the corresponding stopper portion are at the two sides of the stopper structure.

Abstract: A paving and lighting system for lighting a pathway includes a plurality of frame members which are arranged with respect to each other to define a framework. The framework lies substantially on a plane and defines a plurality of paver receiving cells. Each one of a plurality of paver tiles is positioned in an associated paver receiving cell of the plurality of paver receiving cells. Each one of a plurality of light strips is coupled to and positioned atop an associated frame member of the plurality of frame members. A processor is operatively coupled to each light strip of the plurality of light strips. The processor selectively operates the plurality of light strips to emit a selected light pattern.

Abstract: Provided are a light diffuser in which the brightness or hue in an emission surface of the light diffuser is controlled, a lighting device, and a method of manufacturing such a light diffuser. A light diffuser (100) includes: an incident surface (121) to receive first light (Li); a light scattering portion (110) that includes light scattering particles (112) present in a medium (111) and generates scattered light by guiding the received first light and scattering the received first light with the light scattering particles; and an emission surface (122) to emit the scattered light, wherein a concentration of the light scattering particles in the light scattering portion is distributed such that the concentration increases non-linearly and continuously or discontinuously with distance from an incident edge in a light guiding direction of the first light in the light scattering portion.

Abstract: A lighting fixture pendant includes, for example, a connector defining an axis between a first end and a second end, a plurality of elements having an aperture therethrough and having portions asymmetrically disposed around the aperture, at least one spacer having a passageway extending from a first end to a second end, a first element having an aperture therethrough, and a second element having an aperture therethrough. The connector extends through the apertures of the plurality of elements, the first element and the second element, and the passageway of the spacer. The first element is adjacent to the first end of the spacer and the second element is adjacent to the second end of the spacer. When the lighting fixture pendant is supported from the first end of the connector, the plurality of elements, the first element, the second element, and the spacer are vertically aligned along the axis.

Abstract: A bottom-emission light-emitting diode (LED) display includes a transparent substrate, a plurality of LEDs bonded on the substrate, a packaging layer formed on the substrate to cover the LEDs, and a reflecting layer formed on the packaging layer to reflect light emitted by the plurality of LEDs. The reflecting layer has a non-smooth shape or the packaging layer has different refractivities.

Abstract: A twist-lock mounting system for lighting fixtures includes a mounting plate and a canopy cover. The mounting plate that is secured to a junction box includes a plate body, a first wing, and a second wing. The canopy cover that encloses the electrical wire and electrical connections includes a cover body and a track channel. The first wing and the second wing are laterally connected to the plate body. The first wing is diametrically opposed to the second wing about the plate body. The track channel is perimetrically connected around the cover body. The first wing and the second wing are inserted into the track channel via a pair of access gaps and slidably engaged within the track channel. As a result, the track channel and the cover body are able to enclose the plate body, the first wing, and the second wing.

Abstract: A downlight apparatus includes a driver, a light source, a light holder, a first switch and a second switch. The driver has a power converter and a controller. The light holder is used for fixing the light source. The holder bottom of the light holder defines a light opening. The light source emits a light from the light opening. The light holder is placed in an installation cavity. The rim structure is connected to the holder bottom. The rim structure has a rim edge concealing the installation cavity. The first switch is provided for users to operate to adjust a setting. The second switch is provided for users to operate to adjust the setting. The first switch is concealed in the installation cavity. The second switch is placed on the rim edge exposed outside the installation cavity. The first switch and the second switch are coupled to the controller.

Abstract: Apparatus and associated methods relate to an expandable light string that can span various length dimensions. The expandable light string has a flexible backbone cable, a plurality of lighting elements and single expandable member. The flexible backbone cable has a plurality of conductive wires extending and providing electrical conduction along a length between a first end and a second end of the flexible backbone cable. Each of the plurality of lighting elements is conductively coupled to at least two of the plurality of conductive wires of the flexible backbone cable so as to illuminate in response to receiving electrical operating power therefrom. The single expandable member is coupled at a plurality of coupling locations to the flexible backbone cable along the length thereof. The single expandable member is configured to expand or contract so as to change a length dimension of the expandable light string.

Abstract: A fireproof panel light comprises a panel light housing having a wire hole for a wire to pass through and a fireproof pressure plate covering the wire hole disposed on the panel light housing; wherein, the fireproof pressure plate has a passage for receiving the wire, the passage extends from the wire hole outward to the edge of the fireproof pressure plate. The wire hole can be covered by using the fireproof pressure plate, the flame is prevented from fleeing outward from the wire hole, and the fire prevention effect at the wire hole is realized. And the extension direction of the passage on the fireproof pressure plate can further improve the fire prevention effect.

Abstract: The housing provides recessed lighting with a detachable trim. The housing provides an attachment base for securing the trim adapter and trim. The housing provides a sealed housing that limits the number of bugs, pests, and animals from entering the structure or building a nest within the lighting. The housing provides a removable top cover that secures onto the housing. The top cover can be removed to expose vents within the housing. The top cover installs onto the housing to close the vents. The housing also provides an opening for securing a junction box to the housing for installing the wiring needed for the light. The junction box may be installed onto the housing or may be removed from the housing depending on the installation.

Abstract: There is provided an interface system for joining display modules to a framework structure. The interface system comprises a base structure and a holder structure, the holder structure can be attached to the framework, and the base structure can be attached to two or more of the display modules. The holder structure or the base structure are interfaced by a tiltable planar surface and a curved support structure so that the holder structure and base structre are moveable towards each other. A multiple of base structures can be joined via elongated members.

Abstract: The present disclosure sets forth a motion sensing outdoor security light with the flexibility of being mounted to either a wall structure or to an eave or ceiling structure. An adjustable spherical motion sensor housing may be provided with the rotationally adjustable outdoor security light, allowing easy adjustment of motion detection ranges under different mounting schemes without comprising the aesthetic design of the light. The adjustable spherical motion sensor housing may also provide an enlarged horizontal field of view for better performance.

Abstract: A cabin light includes a panel coupled with a light source. The panel includes a pair of longitudinal portions extending along a longitudinal axis of the cabin light, a first lateral portion extending between the longitudinal portions along a lateral axis of the cabin light, and a second lateral portion extending between the longitudinal portions along the lateral axis. Each longitudinal portion includes a first surface and a second surface disposed at an offset from the first surface. The first lateral portion defines a first length and includes a first raised surface. The second lateral portion defines a second length, and includes a second raised surface. The cabin light also includes cover in alignment with the light source. The cabin light further includes a switch disposed between the cover and the second lateral portion.

Abstract: A lighting fixture includes a first housing portion and a second housing portion. The first housing portion includes a base and a wall extending outwardly from substantially the perimeter of the base. A top portion of the wall includes one or more hinges extending outwardly therefrom. The second housing portion includes a front panel and a side panel extending outwardly from substantially the perimeter of the front panel. A top portion of the front panel includes at least one slot. The second housing is coupled to the first housing in an open position when the hinge is inserted into the slot and the front panel is disposed elevationally above the base. The second housing is coupled to the first housing in an operational position when the hinge is inserted into the slot and the front panel covers the base.

Abstract: A plastic barrel includes an object-end portion, an image-end portion, an inner tube portion and a plurality of protrusions. The object-end portion includes an outer object-end surface, an object-end hole and an inner annular object-end surface. One side of the inner annular object-end surface is connected to the outer object-end surface and surrounds the object-end hole. The image-end portion includes an outer image-end surface, an image-end opening and an inner annular image-end surface. The inner annular image-end surface is connected to the outer image-end surface and surrounds the image-end opening. The inner tube portion connects the object-end portion and the image-end portion and includes a plurality of inclined surfaces. The protrusions are disposed at least on one of the inner annular object-end surface, the inner annular image-end surface and the inclined surfaces, wherein the protrusions are regularly arranged around the central axis of the plastic barrel.

Abstract: Disclosed is an infrared sensor with a switch, and relates to the technical field of infrared sensing. The infrared sensor further comprises a key and a function switch, wherein the function switch is fixed on a substrate and close to the direction of a Fresnel lens, the key is installed on the Fresnel lens, the key is connected with the function switch, a user can press the key and control the function switch to work, and the function switch is electrically connected with the substrate and used for switching the working state. The infrared sensor with a switch is simple in structure and convenient to operate.

Abstract: A mount is for attaching an accessory to a fan including a downtube. The mount includes a receiver adapted for connecting to the downtube. A retainer is adapted to receive the accessory. The retainer is adapted to support and rotate about the receiver so as to position the accessory in a desired orientation. Related methods of attaching an accessory to a fan are also disclosed.

Abstract: A display apparatus including a heat sink plane disposed on a bottom surface of a display panel and configured in such a way that a coupling groove with a circuit board accommodated therein is formed in the guide panel, which is coupled to the bottom surface of the heat sink plane, to attach and detach the circuit board into and from the coupling groove through a guide holder disposed on a guide panel.

Abstract: A recessed light fixture includes an LED module, which includes a single LED package that is configured to generate all light emitted by the recessed light fixture. For example, the LED package can include multiple LEDs mounted to a common substrate. The LED package can be coupled to a heat sink for dissipating heat from the LEDs. The heat sink can include a core member from which fins extend. Each fin can include one or more straight and/or curved portions. A reflector housing may be coupled to the heat sink and configured to receive a reflector. The reflector can have any geometry, such as a bell-shaped geometry including two radii of curvature that join together at an inflection point. An optic coupler can be coupled to the reflector housing and configured to cover electrical connections at the substrate and to guide light emitted by the LED package.

Abstract: The present disclosure discloses a light distribution assembly and a lighting device, belonging to the technical field of lighting. The light distribution assembly includes a first lens, a second lens, a first kit, and a second kit; the first lens is disposed on the first kit, the second lens is disposed on the second kit, the second kit is connected to the first kit and is rotatable relative to the first kit to allow the second lens to be rotatable relative to the first lens, and at least one of the first lens and the second lens is a polarizing lens to change a light distribution path of the light distribution assembly.

Abstract: The application discloses a ceiling grid multi-functional LED linear lamp, comprising: a main profile; an LED light bar, which is fixedly arranged on the inner bottom of the main profile; wherein both ends of the main profile are fixedly installed with mounting brackets, wherein the mounting bracket comprises a riveting bracket, a connecting piece and a movable bracket, the connecting piece is fixedly connected on one side of the bottom end of the riveting bracket, and the movable bracket is fixed on the back of the riveting bracket.

Abstract: A luminaire comprises a first light exit opening for emitting light from at least two light sources. A diffusely-reflecting first reflector portion is arranged on an inner side of a luminaire body. A first light source is arranged in an edge portion of the luminaire body surrounding the first light exit opening. First light beams of the first light source are deflected towards the first reflector portion by a second reflector portion, so that said beams exit through the first light exit opening as a diffusely-reflected first light beam bundle. A second light source generates a second light beam bundle. The first light beams exit the luminaire body exclusively as first light beams reflected at the first reflector portion. A second light exit opening is surrounded by the first reflector portion. A second aperture angle of the second light beam bundle is smaller than the first aperture angle.

Abstract: An adjustable light fixture includes a frame configured to connect to a support. A lamp assembly is connected to the frame. The lamp assembly includes a housing, a light emitter connected to the housing, and a lens connected to the housing. The lamp assembly is rotatably connected to the frame about an axis offset from an axis of the frame.

Abstract: A switch and socket cover structure includes a light transmitting cover, an LED light panel, a carrying board and a light control switch component. The light transmitting cover has a first opening, a light emitting area on a side of the first opening, and a light sensing area on a side of the first opening. The LED light panel is installed to the bottom of the light transmitting cover and corresponsive to the light emitting area, the carrying board is installed to the bottom of the light transmitting cover and has a second opening corresponding to the first opening, and an accommodating slot corresponding to the light sensing area. The light control switch component is installed in the accommodating slot and provided for the light sensing area to detect ambient light, and the light control switch component is electrically connected to the LED light panel.

Abstract: A junction box having a cavity to contain electrical wires that provide a connection to a building mains voltage from an electrical system of a building is coupled to a plurality of telescoping hanger bars to hold the junction box in a wall or ceiling in the building. Each telescoping hanger bar is extendible and/or retractable to vary a length of the hanger bar. A position of the junction box is adjustable along the length of each telescoping hanger bar. In one example, the apparatus does not include a can, separate from the junction box, to contain a lighting device of a recessed lighting assembly.

Abstract: A multiple function LED night light has at least one LED device and added function(s) such as an air-freshener adaptor device, sonic device, frequency device, sensor device, bug repeller device, second light device, timepiece, electric message device, timer device, temperature device, surge protection device, electric short circuit protection device, base device for installation on an existing lamp socket, emergency light device, or any other electric device(s) suitable for home use to keep people comfortable or safe. The LED device has a first optic means to change the narrow-viewing angle of an LED's spot-light beams into a wider-viewing angle and second optic means to help make the LED night light exhibit a smooth lighting effect. The device may be arranged to fit into an existing night light bulb socket to turn any existing bulb night light into a power saving LED night light.

Abstract: A lighting fixture pendant includes, for example, a connector defining an axis between a first end and a second end, a plurality of elements having an aperture therethrough and having portions asymmetrically disposed around the aperture, at least one spacer having a passageway extending from a first end to a second end, a first element having an aperture therethrough, and a second element having an aperture therethrough. The connector extends through the apertures of the plurality of elements, the first element and the second element, and the passageway of the spacer. The first element is adjacent to the first end of the spacer and the second element is adjacent to the second end of the spacer. When the lighting fixture pendant is supported from the first end of the connector, the plurality of elements, the first element, the second element, and the spacer are vertically aligned along the axis.

Abstract: A mounting system for a recessed light fixture includes a frame and a holder supported by the frame. The holder includes a base and a support portion extending from the base. The support portion includes a top end, a bottom end opposite from the top end, and an edge extending from the top end to the bottom end. The edge includes a transition portion between the top end and the bottom end, a first step between the bottom end and the transition portion, and a plurality of second steps between the first step and the transition portion. At least one characteristic of the first step is different from each second step.

Abstract: Luminaire (1) comprising suspension means (3) and a housing (5) with a top wall (7). Said suspension means (3) comprising a hook (9a, b) formed of an elastic wire (11) with a loop portion (15) connected to two remote, oppositely arranged end portions (13a, b) each forming a spindle (17a, b), and two elongated channel elements (19a, b) arranged along a rotation axis (21) and mounted on the top wall (7), with each spindle (17a, b) being snugly fitted in a respective channel element (19a, b). By a mutual misalignment between the spindles (17a, b) and the channel element (19a, b) with respect to the rotation axis (21), the hook (9a, b) is in a low tension state when in a first rotational position (27), and in a high tension state when in further rotational positions (29) and urging the hook (9a, b) to assume the first rotational position (27).

Abstract: An infrared radiation deflector (100) for an elongate infrared lamp (110), the radiation deflector (100) comprising opposing first and second elongate side walls (130_1, 130_2); at least one end support (170) connecting the ends of the side walls (130_1, 130_2); an upper opening (140) and a lower opening (150) arranged to pass lamp radiation to an exterior of the radiation deflector (100); and a mounting point (172) provided at the/each end support (170) for mounting the infrared lamp (110) and defining between them a lamp axis location (114); wherein the first and second elongate side walls (130_1, 130_2) comprise a first elongate mirror (130_1) and a second elongate mirror (130_2) extending parallel to the lamp axis location (114) and along at least a lower internal portion of the respective first and second side walls (130_1, 130_2); wherein the lamp axis location (114) extends along and between the first mirror (130_1) and the second mirror (130_2), the first and second mirror (130_1, 130_2) each having a

Abstract: A miniature backlight kit includes a covering member, a light-shading element, a light guide element, a housing and a light-emitting unit. The light-emitting unit is disposed within a first concave structure of the light-shading element. The light-shading element is disposed within a second concave structure of the light guide element. The light guide element is covered by the lateral wall of the housing. The light-emitting unit emits a light beam. The light beam is reflected to the lateral wall of the housing by the light guide element. Consequently, a luminance gradient region is formed on the surface of the lateral wall of the housing.