Abstract: A luminaire mounting kit including a luminaire having a mounting section with a recessed section carrying a first gear wheel portion, the recessed section being flanked by at least one protruding section carrying a second gear wheel portion and a mounting body for engaging with the mounting section, the mounting body having a protruding end portion carrying a first further gear wheel portion for engaging with the first gear wheel portion, and at least one recessed the portion flanking the end portion and carrying a second further gear wheel portion arranged to simultaneously engage with the second gear wheel portion when the first further gear wheel portion engages with the first gear wheel portion. Also disclosed is a luminaire assembly and a method of mounting such a luminaire kit onto a mounting surface.

Abstract: An uplight assembly for pendant lighting fixtures includes a housing, a circuit board, and a diffuser optical element. The housing is configured to be secured to a pendant lighting fixture. The circuit board defines an aperture to accommodate a hanging support for the pendant lighting fixture. The circuit board includes a plurality of light sources at least partially surrounding the aperture. The diffuser optical element is in optical communication with the plurality of light sources.

Abstract: Provided is an illumination device including a light emitting portion including a light source, an intermediate portion connected to the light emitting portion, a supporting portion connected to the intermediate portion and supporting the light emitting portion and the intermediate portion; a connecting portion connecting the light emitting portion and the intermediate portion to be rotatable with respect to each other, and another connecting portion connecting the intermediate portion and the supporting portion to be rotatable with respect to each other. The light emitting portion, the intermediate portion, and the supporting portion connected to the connecting portions may rotate with respect to each other based on the connecting portions to form a three-dimensional (3D) shape, and may be arranged in a single plane when the light emitting portion, the intermediate portion, and the supporting portion are unfolded based on the connecting portions.

Abstract: A luminaire includes a first body module, a light module, a second body module, a wire-receiving unit, and a wire. The light module is disposed on said first body module. The second body module is movable telescopically relative to the first body module. The wire has two ends respectively and electrically connected to the first and second body modules, and a portion that is received within the wire-receiving unit and that is movable at least partially into or out of the wire-receiving unit as a result of adjusting the length of the luminaire, thereby preventing entanglement of the wire.

Abstract: An emergency exit sign having a beacon module for indoor positioning and an indoor positioning system using the same are provided. The emergency exit sign includes a power supply unit, an AC/DC converter, an indoor positioning beacon module, an LED lamp, and a charger. The power supply unit receives an input of a power source and supplies the power source. The AC/DC converter converts the power source supplied and supplies a driving power source. The indoor positioning beacon module periodically wireless transmits a beacon signal including a beacon ID through a built-in antenna. The LED lamp is installed within the housing such that the lamp is positioned in rear of the display. When a power source is not supplied from the power supply unit, the charger supplies a driving power source.

Abstract: The present invention relates to a lighting apparatus (1) or assembly therefore comprising: a carriage (25) coupled to a housing (10a, 10b), the carriage (25) adapted to retain a lamp (14) within the housing, the carriage (25) being moveable relative to the housing (10a, 10b) to manipulate the position of the lamp (14) within the housing (10a, 10b), wherein the carriage (25) is moveable along a first axis by way of a force applied along a second axis. This provides a more convenient way of adjusting the peak/flat of the light apparatus.

Abstract: The adjustable device includes a bracket configured for connection to a substrate, a lamp housing configured for supporting a lamp, and an adjustment system adjustably coupling the lamp housing to the bracket, the adjustment system defining a plurality of different selectable positions of the lamp housing relative to the bracket. The adjustment system enables translation and rotation of the lamp housing relative to the bracket to move the lamp housing between the plurality of selectable positions relative to the bracket. The adjustment system includes a locking system to secure the lamp housing in each of the selectable positions relative to the bracket.

Abstract: An optical fiber light source apparatus, includes a casing, a discharge lamp accommodated inside the casing, a concave reflection mirror, which holds the discharge lamp, and an optical fiber, which receives light from the reflection mirror. The concave reflection mirror, to which the discharge lamp is fixed, is held by a holding member, which has an approximately rectangular flange portion in a front face thereof and a regulating concave portion formed in a side of the flange portion. A guide is provided on the casing in a direction perpendicular to an optical axis, so that the flange portion of the holding member is slidably engaged with the guide. A pressing member, which is pressed with a bias force toward the regulating concave portion of the flange and engages with the regulating concave portion, is provided on the guide, thereby securing the concave reflection mirror.

Abstract: Disclosed herein is a lamp socket extender, generally comprising a base section, an extendable body, and a head section. The base section connects to a light socket, such as an Edison style light socket. The head section attaches to a lamp adapter, which holds a lamp. The extendable body is capable of extending to create more or less distance between the head section and the base section. In a preferred embodiment, the extendable body is comprised of a core covering and a telescopic covering. There may be a wiring harness utilized to more easily attach and detach the wiring from the lamp to the lamp socket extender.

Abstract: A light emitting diode (LED) bulb includes a lamp seat for connecting the LED bulb to an external power source, a rotatable member rotatably connected to the lamp seat, two holders fixed to the rotatable member and a lamp head pivotally connecting with the holders. The rotatable member is rotatable around a first axis. The lamp head is rotatable around a second axis. The second axis is unparallel to the first axis. Thus, an illumination angle of the lamp head can be adjusted with respect to the lamp seat along two planes. An LED module is attached to the lamp head.

Abstract: Provided is a bulb holder locking apparatus, comprising a fixing mount, a bulb holder, a spring and a ratchet mechanism comprising a ratchet bar having a plurality of ratchets, a pawl and a movable cam having a curve contour; wherein the bulb holder is flexibly connected to the fixing mount; the spring is connected to the fixing mount, so as to force the bulb holder to move downwards; the ratchet bar is connected to the bulb holder; the pawl is connected to the fixing mount and elastically contacted with the ratchet bar; the movable cam is slidingly connected to the ratchet bar and elastically contacted with the pawl; and the curve contour comprises a plurality of crests engaged with the pawls.

Abstract: A LED lamp with adjustable beam direction includes a housing, a lamp base attached to one end of the housing for insertion into a lamp socket, a heatsink shaft mounted within the housing, a LED attached to one end of the heatsink shaft, a parabolic or elliptical or multi-facet reflector having a light output front opening and an asymmetric elliptical shaped rear opening, a first actuator for rotating the reflector about the LED, and a second actuator for tilting the reflector about the LED.

Abstract: A recessed luminaire with adjustable socket assembly comprises a housing having a sidewall, a top wall and a lower opening allowing light output, a socket adjustment assembly disposed in the housing, the socket adjustment assembly having: a lamp socket connected to a socket carriage, a track having a socket carriage movably positioned on the track, wherein the carriage moves along the track and the lamp socket is movable in at least one of a vertical or a horizontal direction.

Abstract: A holding hole of a holding body has an edge portion and an inner peripheral surface which is a concavely curved surface connected to the edge portion. In a light source unit which supports a light source, projections are formed at three locations, and each of front surfaces thereof has a convexly curved line having a curvature radius longer than that of the inner peripheral surface. When the light source unit is inserted into the holding hole, the front surfaces of the projections at the three locations are brought into point contact with the edge portion at contact portions on the convexly curved lines.

Abstract: The present disclosure relates to an illuminating apparatus which is received at the back of an outer surface and which includes: a lighting part having a front surface, through which the light is irradiated, and a rear surface, which is the back side of the front surface; an electric connector electrically connected to the lighting part and coupled to a power supply at the back of the outer surface; and a length-adjustable shaft provided between the lighting part and the electric connector and bringing the rear surface of the lighting part into contact with the outer surface.

Abstract: A graphical-user-interface manipulable lighting system is disclosed in which a light source having a position of focus is moved by an articulator adapted to receive and send signals through a control box indicating the current and intended positions of the focus of the light source, and further a computer interface operating wirelessly which graphically displays the current position of the light source and is adapted to allow a user to drag an icon indicating the current position of the light source onto a new intended position thereby resulting in the movement of the light source to the new position.

Abstract: A luminaire comprising a first hub comprising a first fixed portion rotatably coupled to a first rotor portion, said hub having an internal chamber, accessible through openings on the first fixed portion and the first rotor portion; a first lamp socket coupled to the first rotor portion of the first hub; a light rail affixed to the first rotor portion, said light rail having a bore the length of the light rail; a second hub comprising a second fixed portion rotatably coupled to a second rotor portion; and a second lamp socket coupled to the second rotor portion of the second hub, wherein a first set of one or more power wires is coupled to the first lamp socket, wherein a second set of power wires is disposed in the opening on the first fixed portion and further into the bore and is coupled to the second socket.

Abstract: A brake assembly for an adjustable downlight fixture comprises a fixture having a rotational collar assembly, the rotational collar assembly having a first race rotating relative to a second race, a brake assembly connected to one of the first race and the second race, the brake assembly frictionally engaging the other of the first race and the second race.

Abstract: A discharge lamp (10) has a fixing base (20) on one end. In some embodiments, the fixing base comprises a cylindrical first body portion (21) having a pair of notches (21H), a cylindrical second body portion being larger than the diameter of the first body portion and having a joint (23H), and a groove portion (25) formed in between the first and second body portion and having an equal or less diameter of a space of the pair of notches. A first body portion and a stepped surface (21B) of the groove portion is contacted to a base surface of a lamp holder (50) when the fixing base is inserted to the lamp holder.

Abstract: Disclosed herein is an irradiation angle adjuster for a street light which enables one to adjust an angle of light emitted from a lamp. The adjuster includes an arm coupling part, a boss coupling part, a boss, a lamp mounting part and a worm gear. The arm coupling part is coupled to the arm of the street light. The boss coupling part is provided on the arm coupling part. Coupling protrusions are provided at both sides on the boss coupling part. The boss is coupled between the coupling protrusions. Gear teeth are formed on the rear surface of the boss. The lamp mounting part is provided on the front surface of the boss. The lamp is mounted to the lamp mounting part. The worm gear is installed in the boss coupling part and engages with the gear teeth of the boss to transmit rotating force to the boss.

Abstract: An adjustable lighting device includes a light source, a reflector for reflecting light from the light source, a coil of nonlinear thread coiling around the reflector, and a driving member engaging with the coil of nonlinear thread. The driving member is adapted to drive the coil of nonlinear thread to rotate thereby adjusting the position of the reflector.

Abstract: A lighting system has a sealable housing with a lamp cavity, a junction box and a partition wall there between with the junction box being laterally from beneath a lens opening. The system further includes a closure to close an access port in the partition wall which includes a conical wall with a circular plate truncating the wall. The plate extends across the bottom of the housing and a vertically extending sealing flange receives the closure. A ballast assembly is also located from beneath the lens opening. A formed seal is positioned about a lens which extends inwardly to capture optic components beneath the lens. A locking ring is restrained from compressing against the mounting flange of the lens. A lighting system employing an LED board array and LED power control includes a heat sink beneath the board array extending downwardly to a radiator for transfer of heat from the array downwardly to the lamp cavity for dissipation.

Abstract: A light fixture comprising a lamp assembly including a socket and a light source extending along a light fixture axial direction from one side of the socket. The light source is placed in a reflector such that light emitted by the light source is reflected by the reflector in the axial direction. The socket is supported by an inner ring which is supported by a middle ring and the middle ring is supporting by an outer ring. The inner ring is tiltable about a first axis that is orthogonal to the axial direction for tilting the light source, the middle ring is tiltable about a second axis that is orthogonal to both the axial direction and the first axis for tilting the inner ring, and the middle ring being movable with respect to the outer ring in the axial direction.

Abstract: A lighting assembly includes a thermally conductive mounting having a mounting surface is provided. A heat sink seat having a front and rear surface is moveably mounted to the mounting surface. A light emitting device may be attached to the front surface of the heat sink seat. Different embodiments of the lighting assembly, a heat sink and a heat recovery system for the light assembly are also provided.

Abstract: A light fixture includes an elongated channel and one or more lamp socket assemblies. The lamp socket assemblies include at least one lamp socket and a removable row aligner device. The row aligner device is separated from the lamp socket assembly and one side of the row aligner device is positioned in the base of the channel. A second light fixture slidably receives a second side of the row aligner device to provide a properly aligned row of two light fixtures. The lamp socket assemblies include pivot tabs that extend through and pivot within apertures of the channel. The pivot tabs allow the socket track assemblies to rotate from a shipping position where the lamps sockets are housed within the channel to an operational position where the lamp sockets are positioned upright for receiving lamps.

Abstract: A lighting device usable in a vehicle, the lighting device comprising at least a reflector and a lamp, wherein the reflector further includes an orifice. The lamp may be mounted in a lamp holder, the lamp holder being coupled to the reflector and positioned at least partly in the office. In addition, the orifice located within the reflector may be configured to work with a variety of lamp holders, including at least a discharge bulb lamp holder and a halogen bulb lamp holder.

Abstract: Disclosed is an integrated LED bulb that utilizes LEDs and can be used as a standard replacement bulb for incandescent lights that operate on standard household current. One or more LEDs are disposed in a lens 102 that is capable of high optical transmission efficiencies. A base portion encapsulates a printed circuit board and connectors, as well as the LED pin leads to hold the package in a secure mounting. The lens can be molded directly to the base or can be removable. The base can be formed to fit standard threaded sockets or bayonet sockets.

Abstract: The present invention relates to lighting strips and more particularly to modular lighting systems comprising lighting devices, for example, lighting strips, physically and electrically connectable with one another by way of a plug and socket integrally formed at opposing ends of the lighting strips. The lighting strip devices can be made of flexible material to allow for applying the lighting devices along flat as well as contoured surfaces. The lighting strips can also be rigid. More particularly, embodiments of the invention include modular lighting strips comprising: a non-conductive substrate strip comprising an electrical circuit; a plurality of light sources operably connected to the electrical circuit; a plug integrally formed at an end of the substrate strip; and a socket integrally formed at an opposing end of the substrate strip; wherein the plug and socket provide for removable, friction-fit, latch or latchless, and electrical interconnection of two or more circuits.

Abstract: A ventilating exhaust fan including a housing, a light source module, and a panel module, with a conveniently replaceable light source is provided. An added swivel structure between a reflective cover and a lamp socket enables the lamp socket to turn around at certain angles relative to the reflective cover, and when the strip lamp needs to be replaced, it is convenient to pull the strip lamp out by turning the lamp socket that is integrated with the strip lamp, and at the same time the swivel structure enlarges the space between the strip lamp and the reflective cover and makes it easier for an operator to apply force by holding the strip lamp to pull it, and in addition, it can prevent the breakage of the strip lamp, thus eliminating potential harm or injury to the operator.

Abstract: A lighting apparatus is provided. The lighting apparatus includes a power supply housing section, a circuit board housing section, a light source housing section, a cutout portion, and a light source. An image recorded on a record medium is displayed in the state that an end portion of the power supply housing section and an end portion of the record medium secured to the cutout portion are placed on a surface where the lighting apparatus is placed.

Abstract: Provided is a bulb holder locking apparatus, comprising a fixing mount, a bulb holder, a spring and a ratchet mechanism comprising a ratchet bar having a plurality of ratchets, a pawl and a movable cam having a curve contour; wherein the bulb holder is flexibly connected to the fixing mount; the spring is connected to the fixing mount, so as to force the bulb holder to move downwards; the ratchet bar is connected to the bulb holder; the pawl is connected to the fixing mount and elastically contacted with the ratchet bar; the movable cam is slidingly connected to the ratchet bar and elastically contacted with the pawl; and the curve contour comprises a plurality of crests engaged with the pawls.

Abstract: The invention relates to a lighting unit, comprising a first light element formed as a conventional light source, a second light element formed as a plurality of LEDs and a lamp cap. According to the invention the second light element is formed as a separate LED module with a fitting and a second lamp cap whereby the first and the second light elements are removably attached via the fitting and the second lamp cap, the fitting and second lamp cap providing electrical and mechanical connection between both light elements. The invented lighting unit is cost-effective and has better mixing possibilities of the light produced by both light elements.

Abstract: A lamp adjustment assembly for a light fixture includes a socket platform having a base and hollow neck. A socket mounts to the base. The interior of the hollow neck includes at least three spaced-apart cam followers. A cam having spiral grooves includes a first portion that fits at least partially within the interior of the hollow neck. The cam followers mate with the grooves. An adjustment knob is coupled to a second portion of the cam and rotatably coupled to a socket housing that at least partially encloses the lamp adjustment assembly. Alignment wings extend from the base of the socket platform and are sized to fit within slots in the interior of the socket housing. The slots prevent the socket platform from rotating and limit the linear range of motion of the socket platform. A spring applies force to the base and the adjustment knob.

Abstract: An externally adjustable directional canopy luminaire is disclosed that may be easily and quickly adjusted from the outside of its housing to direct light toward a particular target area. The luminaire includes a lamp shroud assembly including a door frame, a shroud and a lamp socket which is connectable to an electrical power source to power a replaceable lamp, an external adjustment member, and an internal mechanism movably connected to the external adjustment member through the shroud and indirectly connected to a portion of the lamp socket, wherein adjustment of the external adjustment member can alter the angle of direction of the lamp socket and thus the direction of light emitted from the replaceable lamp through the opening of the shroud.

Abstract: A bulb holder which comprises a bulb socket and a housing, a ring member formed of a resilient material, the ring member having first and second ends biased away from each other to a position where the first and second ends are spaced apart, the ends being movable towards each other to thereby diminish the size of the ring, and first and second arms interconnecting the ring member and the socket housing. The bulb holder permits circulation of air throughout a transparent tube in which the bulb is mounted.

Abstract: An illumination device including at least one arm supporting one or more light emitting devices, such arm pivoting from a closed configuration for passing through a hole to an open configuration for function. In a preferred embodiment, the illumination device includes three or five arms, light emitting diodes (LEDs) as the light emitting devices and, springs for automatically pivoting the arms to the open configuration.

Abstract: A hand-held portable drop-light is provided. The light comprises a handle, a housing, a cover, a novel mounting assembly, and a light bulb. The mounting assembly is configured with a pivoting light bulb socket and positioned within the handle for mounting the light bulb within a housing interior. The housing possesses an aperture through which the container interior and light bulb may be accessed. The cover is reversibly attached to the housing so as to inhibit access to the light bulb through the aperture. When replacing the light bulb, the cover is moved from the aperture and the mounting assembly is pivoted between a retracted position, where the bulb is substantially retained within the housing and an extended position, where a portion of the bulb is positioned outside the housing. In this manner, the light bulb is easily accessed for replacement.

Abstract: A lighting system that includes an elongated strip of flexible, shape-retaining material and a plurality of light sockets mounted on the strip. Each of the light sockets is electrically connected together and may be adjusted individually so that light may be directed in a variety of angles and directions. The flexible material is malleable. All of the wiring is located within and extends along the strip of material with a plug extending outwardly from an end of the strip. The strip may be mounted and secured about or to an indoor or outdoor structure.

Abstract: A light fixture removably attachable to a stationary socket includes a lamp socket mounted for receiving a lamp and a connector which is electrically engageable with such stationary socket. The connector is attached in spaced relationship to the lamp socket and is electrically connected thereto. The light fixture may include a housing having the lamp socket mounted therein with the connector attached to the housing in one of a rigid, hinged and swivel manner. The light fixture is advantageous for converting a unidirectional recessed light fixture into a multidirectional light fixture.

Abstract: A decorative lamp that includes a base and a poseable stem that extends from the base. A spring is connected with respect to an end of the poseable stem opposite the base and a wire is routed through the poseable stem and through the spring and into a socket positioned at an end of the spring opposite the poseable stem. A vibrator may be positioned on the decorative lamp to impart a motion to the socket.

Abstract: An orientation adjustable lamp comprises a stand rod extended with a supporting frame; a rotation control device positioned to the stand rod; an arm having one end connected to the rotation control device and another end connected to a lamp. The rotation control device includes a seat, a rotation portion, a locking unit and a handle. The seat has an axial hole. The rotation portion is installed at one side of the seat. The rotation portion has a locking stud corresponding to the axial hole of the seat. One end of the locking stud is a threaded section. The rotation portion is installed with a threaded hole for locking the locking unit and a via hole which radially passes through the threaded section. The handle is installed at another side of the seat; the handle having a threaded hole for locking the locking stud and the threaded section.

Abstract: A lamp with a single base is mounted on a lamp holder by processes of contacting a second mounting face of the base with a first mounting face of the lamp holder and turning the base in a first turning direction with respect to the lamp holder. A plurality of engaging projections is formed on the lamp holder with which a plurality of engaging protrusions of the base is engaged, when the base is turned in a first turning direction. A pair of hooking receivers is formed on a mounting face of the lamp holder so as to be hooked with a hooking protrusion of the base. A pair of lamp holding springs is provided on the lamp holder for applying forces for restricting turning of the base in a second turning direction opposite to the first turning direction under a condition that the second hooking portion of the base is hooked with the first hooking portion. Thus, safety and reliability of mounting of the lamp on the lamp holder can be increased.

Abstract: The device includes means for illumination, means for attaching the device to a flag pole so as to direct the illumination generally in the direction of a flag, and means for selectively energizing the illumination means only during hours of darkness. It is preferred that the means of illumination be permanently connected to a source of energy, such as an external source of AC or DC power, internal battery power or solar power, that provides a photo-cell-operated switch for monitoring the ambient light and for following the energy source to be directly applied to that illumination means primarily during hours of darkness.

Abstract: A headlamp adjusting system, particularly for motor vehicles, includes a headlamp body and optical system having reflector and regulating elements for adjustment and fixation of the reflector. The reflector is carried by a part of a pivot holder that, by means of a weakening hinge, allows swinging movement of the central portion of the pivot holder. The fixed portion of the pivot holder is connected to the headlamp body. A socket for holding an end of the regulating element is provided at the free side of the pivot holder. For adjustment of the reflector in two mutually different planes, the central part of the pivot holder is swingable by means of two hinges.

Abstract: A new fluorescent lamp comprises a lamp tube and an electronic ballast, it is characterized in that it is provided with an outer tube, there are respectively an outer plug at both ends of the outer tube, in which inserts a socket for the lamp tube. The electronic ballast is between the outer plug and the socket for the lamp tube at one end, said lamp tube is disposed between two sockets for the lamp tube.

Abstract: An adjustable reflector socket is provided having a bulb socket, a mounting member and a mounting plate. The mounting member has an exterior sidewall, a first end having an end plate, and a second end adjacent to the bulb socket. The sidewall has at least one groove formed therein, with the groove having a plurality of apertures formed therein. The mounting plate preferably has a planar component with at least one mounting aperture through which a fastener passes to attach the plate to the lighting reflector, and a mounting member aperture configured to permit the mounting member to be inserted therethrough. The plate also has at least one flange member extending generally perpendicularly from the juncture of the plate and the mounting member aperture, with the flange member dimensioned to be slidably adapted in the sidewall groove, and with it having formed therein at least one flange aperture.

Abstract: An insertion structure for inserting a lamp rod to a wire winding box comprises a lamp seat and an inserting head. The retaining seat has a flange and a lateral side of the flange is a threaded surface. The threaded surface passes through the via hole of the wire winding box. A hollow slot is formed on threaded surface of the retaining seat. A lateral side of the slot is locked with a reed. An inner side of the reed is punched with an embedded block. The embedded block protruding into the slot of the retaining seat. An interior of the insertion head is fixed with a conductive plug. A lateral side of the insertion head has a bank of teeth for buckling the retaining seat. Thereby, a lamp rod with the insertion structure is detachable from the wire winding box easily for storage and transfer.

Abstract: The present invention is directed to a lighting apparatus to be used on an umbrella pole or similar upright structure with a convenient and concealed mounting mechanism and a slip-resistant vertical adjustment mechanism, designed to provide the user with an easily adjustable and removable/attachable source of light, wherein the means by which it is removed or attached is attractively concealed from the casual observer.

Abstract: A compact portable fluorescent lighting unit provides concentrated even coverage illumination for many visual arts, theater, studio or location applications. Beam width is conveniently user-adjustable without tools, typically in three steps: 60, 70 and 90 degrees. A pair of identical lighting cells are stacked one above the other; each cell can utilize any one of a variety of fluorescent lamps providing powerful illumination. Each cell has an efficient reflector and provision for beam width selection by varying the spacing of the lamp from the rear of the reflector via easily adjustable socket/lamp support brackets. A welded aluminum mounting yoke, with arms swivel-attached to opposite ends of the housing, can be set to any desired orientation for beam-aiming and locked in place to the housing by a user knob. The yoke can be affixed directly to building structure or mounted via a pipe or stand adaptor, optionally swivelled to provide a second beam-aiming axis.

Abstract: A theatrical luminaire for entertainment and architectural applications includes a lamp socket accessible from the exterior of the luminaire housing. A lamp includes a base, a bulb on one side of the base and a handle on the other side. The handle is grasped to insert the lamp into the socket. When the base is mounted in the socket, the bulb extends through the socket into the luminaire and the handle remains accessible at the exterior of the luminaire. The lamp is mounted with a one-handed push and turn motion, and contacts on wings of the base engage socket contacts as the lamp is turned to its final position. The socket is mounted on a support that is adjustable relative to the luminaire housing to preserve the correct lamp positioning when the lamp is replaced.