Abstract: A lamp rack and lamp holder quick-release connecting structure includes a first connector fastened to a lamp rack by a lock nut, and a second connector fixedly provided at one end of a lamp holder for connecting the lamp holder to the first connector and for enabling electric wires to be extended from the lamp holder to the inside of the lamp rack, the first connector having a tubular mounting member with an outside annular groove, the second connector having a C-shaped retainer ring mounted in an inside annular groove thereof for engaging the outside annular groove of the mounting member to secure the second connector to the first connector.

Abstract: A light guide plate has a back face provided with a first light diffusion pattern which tends to get denser according to an increasing distance from a primary light source. The light guide plate has an emission face provided with a second light diffusion pattern covering rate of is the largest at an approximately center portion (particular partial region) of the emission face. The first and second light diffusion patterns consist of a great number of fine light diffusion elements, respectively. Each fine light diffusion element of the second light diffusion pattern has a smaller size as compared with that of the first light diffusion pattern. The emission face of the light guide plate has an effective emission area to provide an emission light which is supplied to an LCD panel or other objects to be illuminated, via a light control member such as prism sheet. The approximately center portion and/or other one or more particular partial regions in the emission face show an intentionally heightened brightness.

Abstract: The present invention relates to an illuminating or indicating device, including at least two light sources, each light source being associated with a first optical system.

Abstract: A light hardening device is provided and includes a light source having a plurality of LEDs supplied by an electrical energy source, and a cooling device arranged upstream of the light source and operable to cool the light hardening device. The LED arrangement is disposed on a rear surface of a cooling body and the light hardening device has a connection in the manner of a halogen glow lamp. Also, a light source is provided having a plurality of LEDs, a cooling body on which the LEDs are mounted, and a connector element and an overall exterior geometry, each of which corresponds to the respective connector element and overall exterior geometry of a conventional reflecting halogen glow lamp having a rated voltage of 12 volts.

Abstract: A light module includes a light emitting diode assembly defining a front side light emitting diode array and a rear side. The rear side is in thermal communication with a thermally conductive spreader, and a thermally conductive core is in thermal communication with the conductive spreader. The thermally conductive core includes an electrical conductor in operative communication with the front side light emitting diode array, and a plurality of appendages are disposed about the thermally conductive core such that they are in thermal communication with the conductive spreader.

Abstract: A twinkle bulb light set includes, alternately from one end of the light set to an opposite end of the light set, at least one standard bulb socket configured and dimensioned to operatively receive a standard or steady-burning bulb and at least one non-standard bulb socket configured and dimensioned to operatively receive a non-standard twinkle bulb. The standard and non-standard bulb sockets are configured and dimensioned to operatively receive only standard and non-standard bulbs, respectively. Preferably the standard bulb socket is smaller than the non-standard bulb socket in at least one dimension such that the standard bulb socket cannot operatively receive a non-standard bulb, and the non-standard bulbs have at least one dimension greater than that of the standard bulbs, thereby to preclude operative receipt of a non-standard bulb in a standard bulb socket.

Abstract: A light system, including a channel sign having a cover, walls and a bottom; a power source; a wire harness coupled to the power source; a flexible conductor strip coupled to the wire harness, the flexible conductor strip defining solder pad openings and the flexible conductor strip coupled to the channel sign, the flexible conductor strip being foldable; a socket mounted to the flexible conductor strip, the socket including pin receptacles in electrical contact through the solder pad openings; and a light having conductive pins, the conductive pins disposed in the pin receptacles and a method of installing lights including mounting a flexible conductor strip to a structure; supplying power to the flexible conductor strip; electrically connecting lights to the flexible conductor strip to power the lights; and exchanging burned out lights with operable lights without removing the flexible conductor strip.

Abstract: A framework for a lighting fixture, such as a chandelier, includes frame members that contain or support decorative ornaments. The ornaments may be captured within the frame members without the use of attachment elements. The frame members may be formed with substantially parallel rails defining cages that are sized to hold beads, crystals or other decorative ornaments. In some embodiments, the ornaments may viewed from any angle without substantial obstruction by the frame member.

Abstract: A double-stacked type lamp unit for a vehicle comprising an LED lamp unit using an LED lamp as the light source and having a reflecting surface for the LED, and an incandescent lamp unit using an incandescent lamp as the light source and having a reflecting surface for the incandescent lamp, is configured so that the reflecting surface for the LED is formed partially optically transparent, and the incandescent lamp and the reflecting surface for the incandescent lamp are arranged on a back surface of this reflecting surface for the LED. The LED lamp unit and the incandescent lamp unit are therefore coupled to each other in a manner that the reflecting surfaces are stacked, whereby the combination of the lamp units may display as a different lamp color.

Abstract: A lens array for a lamp directs light to a light conduit such as an optical fiber or light pipe for guiding light to a remote location. An array of LED serve as light sources. The lens array includes an integrally formed member having a number of collimator lenses positioned in the lens array so that each lens can operate as a collimator for a corresponding LED to produce a respective collimated beam of light. The lenses have optical properties that are optimized according to where their corresponding LED are positioned in the LED array, so that the lens array is provided with lens prescriptions that produce refraction of the collimated beams of light toward an entrance aperture of the light conduit.

Abstract: The lighting unit comprises a first lighting element (10) and a second lighting element (11). In operation, the first lighting element (10) has a comparatively high light output. The second lighting element (20, 20′) has a light output, in operation, which is relatively low in comparison with that of the first lighting element (10). The lighting unit comprises a control mechanism (40) including a switching means with a toggle function that is responsive to sequential switches in the power applied to the lighting unit. By selecting the proper switching sequence, either the first lighting element or the second lighting element or both lighting elements are switched on. Preferably, the first lighting element is a compact fluorescent discharge vessel (10), and the second lighting element comprises a plurality of LEDs (20, 20′). The lighting unit enables remote-controlled switching between orientation light (night lamp) and normal light, using the toggle function in the lighting unit.

Abstract: A solid state light apparatus suited for use in traffic control signals and having a unitary transparent cover generating a homogenous light beam. A solid state light source comprises an area array of LEDs uniformly illuminating a light diffuser to achieve the homogenous light beam. The unitary cover has a lens defined at an inner portion thereof, and an outer portion encompassing the lens adapted to sealingly secure to the apparatus housing. The lens is continuous with the outer portion such that water and other environmental elements can not penetrate into the housing electronics.

Abstract: An illuminating apparatus includes a plurality of light members spaced apart from each other and operable so as to produce forwardly directed parallel light rays, a parabolic reflector disposed in front of the light members for receiving the forwardly directed parallel light rays from the light members, and an integrator unit. The parabolic reflector has a reflecting surface that confronts the light members. The integrator unit has an input side to receive the light rays reflected by the reflecting surface of the parabolic reflector.

Abstract: A lighting system is disclosed. The lighting system includes a first selectively actuated light module that emits light having a first polarization orientation. A second selectively actuated light module emits light having a second polarization orientation that is orthogonal to the first polarization orientation. A first combining element combines and directs light from the first and second light modules into an optical path. A first polarization alignment element aligns the polarization of light from the first combining element to a predetermined polarization orientation. The first and second light modules are selectively actuated to ensure that light having the predetermined polarization orientation is substantially constantly emitted when desired.

Abstract: A dual mode visible and infrared lighthead (100) for use as a landing light or searchlight. The dual mode lighthead incorporates a modular design wherein at least one visible light source (200) and at least one infrared diode (302) are mounted into the rear sector (128) of a housing (102). Visible or infrared light is emitted out of the front sector (122) of the housing (102). Lenses (308) are installed onto the front sector (122) of housing (102) and sealed to protect the interior of the lighthead (100) from the elements.

Abstract: An illuminating apparatus includes a plurality of light members spaced apart from each other and operable so as to produce forwardly directed parallel light rays, a parabolic reflector disposed in front of the light members for receiving the forwardly directed parallel light rays from the light members, and an integrator unit. The parabolic reflector has a reflecting surface that confronts the light members. The integrator unit has an input side to receive the light rays reflected by the reflecting surface of the parabolic reflector.

Abstract: The present invention provides an elongate rope light and method of forming and using the same. The rope light preferably has a plurality of exposed elongate main body conductors, at least one exposed elongate light string conductor connected to at least one of the main body conductors and positioned to extend substantially the entire length of the rope light, and a plurality of lights positioned along the light string conductor. The light string conductor is preferably positioned substantially parallel to the plurality of main body conductors. The rope light also includes a substantially solid and translucent, flexible sheath having a continuous annular shape.

Abstract: In a deuterium lamp box in accordance with the present invention, a wavelength of light different from that of a deuterium lamp can be forwardly let out from a light exit opening. Namely, when the deuterium lamp of a see-through type is lit, the light generated from the deuterium lamp can be let out from the light exit opening. When a second lamp is lit while the deuterium lamp is turned off, the light generated from the second lamp 85 passes through the deuterium lamp while in a state collected by a lens, and is let out from the light exit opening. When the deuterium lamp and the second lamp are lit at the same time, different wavelengths of light are let out from the light exit opening while in a mixed state. Thus, three kinds of light can be made depending on how the lamps are lit, whereby this lamp box is considered to have a versatility much higher than that of a lamp box accommodating only one lamp.

Abstract: A component of a generally cylindrical luminous signaling column housing plural conductors that are substantially parallel to the axis of the cylinder and a printed circuit bearing plural LED luminous sources. The printed circuit is oriented such that its main plane is parallel to the axis of the component and bears plural LEDs on each surface. The cylindrical luminous signaling column includes a cylindrical inner surface provided with light-diffusing reliefs.

Abstract: A decorative lighting display composed of ornaments, each having a form resembling a snowflake and illuminated by a light or lights. The illumination of the ornaments is sequenced by an electronic controller to create the illusion of falling snow when the display is mounted on a house, tree or other surface. The ornaments may be connected electrically by multi-conductor connectors which are wired in a configuration that maintains the proper sequence of ornament illumination as additional ornaments are added to the display. The controller has features that allow for adjustment of the sequencing rate and direction.

Abstract: An method and apparatus that generates light at various up-angles. A planar surface having a plurality of LEDs equally spaced in a circular arc directs light at a conical reflector, which redirects the generated light in a 360-degree arc of light (i.e., light beam) that is then concentrated by a magnifying lens. The light beam has a small vertical angle of divergence and appears to originate from a point light source in the center of the conical reflector. A base assembly has mounting positions to which the planar surface, conical reflector and magnifying lens are secured and maintains the lantern in an up-right position. The base assembly includes a plurality of mounting positions for securing the planar surface at various predetermined distances from the conical reflector, thereby directing the generated light beam at a corresponding predetermined up-angle.

Abstract: Disclosed is an illumination system which includes a first optical system for combining plural light fluxes from plural light sources and for projecting the plural light fluxes to a surface to be illuminated, a second optical system for separating a portion of one of the combined plural light fluxes, and a first detecting system for detecting the light quantity of the portion separated by the second optical system.

Abstract: An operating theater luminaire having at least two discharge lamps, which can be switched on and off, can be started and alternatively can be switched on by means of a starting device, and illuminate an operating area via optical means, in particular at least one reflector. A plurality of, in particular two discharge lamps, equipped with individual starting devices, of different powers are provided, as a result of which the intensity of illumination in the operating area can be varied when switching over from one discharge lamp to another.

Abstract: The present invention relates to a figured lamp structure with a specially designed connection mechanism. It mainly comprises a simple coupling element in conjunction with connection mechanisms disposed on the ends of a lamp case to enable the figured lamp to be connected to another one in series in an easy way. By such a mechanism, a plurality of lamps can be put together to form a lamp array to arrive at a unique decorative effect.

Abstract: An LED luminaire is formed such that a plurality of LED chips are disposed three-dimensionally on an MID (molded interconnection device) substrate in a rectangular plate shape, by mounting three LED chips on bottom face of respective dents provided lengthwise and crosswise in one surface of the MID substrate, the LED chips including at least two types mutually diffferent in luminous color, desirably three types of red, blue and green colors. Any optional light distribution characteristic is made thereby easily obtainable depending on a configuration of the substrate, luminaire module can be thinned, and such delicate color difference as white color and day-light color of luminescent lamps is enabled by mixing the luminous colors of the respective LED chips.

Abstract: Illuminated shoes are provided with a switch having a fixed end for connection to one side of a battery and a movable end for contacting one of a plurality of selectable conducting members each connected to a separate terminal of a sub-circuit. Each sub-circuit contains a source of light or sound with a common terminal at the opposite end from the separate terminal and connected to the other side of said battery. The switch movable end moves substantially randomly or in random patterns under inertia to contact a conducting member to complete a sub-circuit.

Abstract: A lighting apparatus 1 has a convex lens 11 arranged so that its optical axis is at an angle &thgr; with respect to the normal of an observation portion 3a (e.g., a semiconductor substrate or the like), with a camera 5 arranged in the path of the reflected light rays. When a light-emitting portion 13 is arranged along the optical axis of the lens 11, a bright field illumination takes place. If a knob 29 is turned, the light-emitting portion 13 moves along a ball screw 25, thereby changing the illumination from a bright field illumination to a dark field illumination. When a knob 37 is turned, the light exiting the lens 11 will diverge if the light-emitting portion 13 is moved close to the lens 11, converge if the light-emitting portion 13 is moved far away from the lens 11, and be parallel if the light-emitting portion 13 is positioned at the focal point of the lens 11.

Abstract: A vehicle signal lighting unit includes a light source, a plain outer lens, and a composite reflecting mirror consisting of a unit reflecting surface which reflects light having desired light distribution characteristics from the light source. The light source emits no direct light in an illuminating direction of the vehicle signal lighting unit, and is positioned to allow incident light against said composite reflecting mirror from at least two directions, and to prevent direct observation of the light source itself through the outer lens. Each unit reflecting surface of said composite reflecting mirror includes reflecting surface which reflects light from the light source from said two directions. Since the light source is provided outside an effective luminescent surface, the light source cannot be observed directly from outside through the plain outer lens. The light source can be mounted on both ends of the lighting unit outside an effective luminescent surface.

Abstract: An LED light bulb for use as an indicator or warning lamp comprises a support structure; a generally circular and planar disc attached to the support structure, wherein the disc is a printed circuit board and is perpendicularly oriented with respect to the structure. A plurality of interconnected LEDs are concentrically mounted on the disc wherein a portion of the LEDs are outwardly splayed at an angle away from a central axis point of the disc so that the LEDs collectively transmit light having about the same light intensity at viewing angles from about 0° to about 360° about the disc. The LED light bulb has circuitry means for providing a current to the LEDs.

Abstract: Shoes have a switch having a fixed end for connection to one side of a battery and a movable end for contacting one of a plurality of selectable conducting members each connected to a separate terminal of a sub-circuit. Each sub-circuit contains a source of light or sound with a common terminal at the opposite end from the separate terminal and connected to the other side of said battery. The switch movable end moves substantially randomly or in random patterns under inertia to contact a conducting member to complete a sub-circuit.

Abstract: A multi-flash strobe light pattern is superimposed on each individual light pulse produced by an incandescent lamp to provide a warning signal of enhanced visibility in a particulate laden ambient environment. The first pulse of each multi-flash strobe pattern is delayed for a time period, subsequent to energization of the incandescent lamp, which is equal to at least 80% of the time required for the incandescent lamp to achieve its maximum light output intensity.

Abstract: A lighting device has a support that can be screwed into a standard 120 volt light socket. A ring with multiple, alternating color, circumferentially spaced LEDs, is connected to the support and a reflector is provided over the ring for reflecting light from the LEDs past the ring. A power supply circuit is connected to the LEDs for powering the LEDs to emit light. The light can be white if the LEDs are a combination of red, blue and green or other white-forming combinations, or the power circuit can selectively power subsets of the LEDs to produce and desired color. The same circuit can be used to vary the intensity of the light in the manner of a dimmer.

Abstract: A decorative water lamp includes a water container, a support base located under the water container and having an upper mouth, a light emitter unit fixed under the upper mouth and having a plurality of light emitters (such as LED) of different colors--green, red and blue--to be lit up in various orders to shine the water in the water container through the upper mouth of the support base. Air is blown by a pump controller fixed in the support base through an air tube extending in the water container to produce shocked water current flowing in a regular rhythm added with colored lights from the light emitters, which is controlled to light up in various orders by means of an electronic circuit board powered by a power supplier.

Abstract: A lighting box has a housing with an open front and open rear and a bar such as speed rail.TM. extending horizontally across the housing. Multiple stage-type lights are mounted on the bar and positioned to send light out the front of the box. The box also has a diffusion element (frame) disposed proximate its front end, and even may have multiple elements including having one element at an angle. The element or elements receive the light from the lighting instruments and diffuse it to provide a soft projected light from the box. In accordance with one aspect of the invention, this light may be used to provide diffused light as part of the key lighting for a stage or set, and may provide such soft projected lighting from a front (downstage) of the stage or set.

Abstract: An apparatus for selectively providing light of different shades as an aid in designing interiors has a housing that is closed except on an operator side. A light subsystem in the interior of the housing has a plurality of light sources. First and second panels within the housing are tack boards allowing fabric to be attached to them. The first panel is downwardly inclined toward the operator side, whereas the second panel is upwardly inclined toward the operator side. The light subsystem includes downwash light sources for illuminating fabric on the first panel so that a human sitting on the operator side can select a shade of white light to be used with a given fabric. The fabric would then be attached to the second panel where an upwash light source illuminates the fabric to confirm the selection of a given shade of white light as best matched to a given fabric.

Abstract: A tool includes a handle in which a cassette is received and a shank extending from the handle with a bit or a socket connected to the shank. The cassette has batteries received therein and two tubes extending from the first end thereof so that two bulbs are received in the two tubes. A button device is connected to the second end of the cassette and contacts the batteries. The button device and the cassette are a one-piece member which is conveniently received in and removed from the handle.

Abstract: A lighting indicator assembly is provided that includes a main unit, a light plate and an outside frame. Inside the main unit a voltage transformer, circuits and other components are accommodated. The light plate includes a plate body, on which grooves are formed. The grooves outline alphanumeric characters. A plurality of light tubes are disposed in the grooves to form illuminated representations of the alphanumeric characters. At least two light tubes form each character. The light tubes are connected to each other by connecting wires and connectors. The light plate is accommodated at the front side of the main unit. The outside frame is fitted to the front of the main unit. The outside frame and main unit are joined as one unit by means of projections on the outside frame engaging openings formed in the main unit. The outside frame presses and fixes the plate body of the light plate to the main unit.

Abstract: Disclosed are a backlight and avionics display using the same to provide light to a liquid crystal display (LCD) device. In the backlight, a day mode light source positioned on a first side of the LCD device and adapted to provide a first source of light for use by the LCD device during day mode operations. A night mode light source positioned on the first side of the LCD device is adapted to provide a second source of light for use by the LCD device during night mode operations. A sculptured transflector positioned between the day mode light source and the night mode light source has, at a first side adjacent the day mode light source, a transflective material and a plurality of arcuate or parabolic surfaces in order to maximize a percentage of light from the day mode light source which is reflected toward the LCD device.

Abstract: Electric luminaria is made by a unique method from a one-piece blow molded container having a neck formed at one end of a base, an intermediate radially outward extending flange at an opposite end of the base and a hollow shell extending from the flange. The flange is peripherally cut to form two flanges, one attached to the shell and one attached to the base. The base has an aperture formed in the neck for receiving a light socket therein, with the electric conductors extending from the light socket passing through the neck and over the peripheral flange of the base. The shell is placed over the base with the peripheral flanges of the base and the shell disposed in an overlapping arrangement. Stakes are inserted through aligned apertures in the flanges of the shell and base to fix the luminaria on the ground. A decorative sleeve is replaceably mounted about the sidewall of the shell.

Abstract: A surface mounting type light emitting display device is provided which includes a base plate and a case member. The base plate is formed with terminal electrodes at least along one edge thereof and carries light emitting elements thereon. The case member is provided for covering and accommodating the light emitting elements. The display device further includes a mounting device for attaching the case member to the base plate while allowing the case member and the base member to expand and contract independently of each other at least in one direction.

Abstract: A phantom color light mirror including a mirror, a plurality of colored light sources, and a central control device. The mirror is composed of a transparent sheet having a reflective layer affixed to a rear surface thereof. A plurality of lines of a sufficient width are used to engrave the reflective layer with a graphic design visible from the front side of the transparent sheet. The operation of the colored light sources are controlled by the central control device. The mirror, the light sources and the central control device may be accommodated in a cabinet. A refracting device may further be disposed behind the mirror to provide enhanced visual effects.

Abstract: A device for an automotive vehicle to signal braking, deceleration, turning of the vehicle or an emergency situation. The device has two bodies facing rearwardly, mounted near the top of the back or the highest point of the vehicle adjacent the sides of the vehicle. Each body has a base and a cover with translucent lenses. Light sources and reflectors are disposed on the base for illuminating the lenses to create the signaling as required. Lighting one or more lenses in the cover indicate braking while lighting an arrow shaped lens in the cover and a side lens facing out from the vehicle indicate intended turning. The light transmitted through the lenses in the cover is directed downwardly either by a downward tilt to the cover or by directional configurations formed on the lenses. The lenses signifying braking are formed from red material while the arrow shaped and side lenses signifying turning are formed from red or yellow material.

Abstract: A lamp assembly includes a body, support structure adjacent the body, and a socket for carrying a bulb, the socket being connected to the support structure. An illumination light source is adapted to illuminate the body by directing light into the interior of the body. The body is comprised of a light transmissive material.

Abstract: The present invention relates to an LED-illuminated lamp assembly which includes a lens that is capable of directing light from the LEDs both horizontally and vertically. The taillight mode is also directed slightly upward so as to comply with applicable lighting regulations. The lamp assembly also includes a current regulating assembly which is mounted within the housing and attached to a power source for providing current to LEDs positioned within the housing. The LEDs are mounted on an LED board assembly. The current regulating assembly is capable of maintaining steady current through the LEDs independent of the power source voltage so as to prevent an overheating of the LEDs at higher than normal voltages and to provide constant, non-flickering light output with varying input voltages.

Abstract: The invention relates to a display panel presenting a matrix array constituted by a plurality of light emitting elements. A mask composed of a vertical wall presents a plurality of openings opposite the light emitting elements and a plurality of fins directed towards the display surface and at a distance therefrom. The mask intercepts virtually all the sun's radiation and avoids heating of the display surface due to such radiation.

Abstract: A clearance and side marker lamp, or PC lamp, such as for truck/trailer combinations, is provided with LEDs mounted to a plurality of circuit boards. The circuit boards are mounted at predetermined angles relative to each other for directing light in at least three directions. A lens is provided in front of the LEDs and includes a series of prism optics for spreading the light emitted from the LEDs into an arc of up to 180 degrees.

Abstract: A background lighting apparatus comprises a light source arranged adjacent to a light entering end face or surface of a transparent plate and having an irregular reflecting surface or portion on at least one side thereof and wherein the irregular reflecting surface or portion comprises a plurality of milky white type fine lines. The width of the fine lines of uniform pitch monotonically increases across the transparent plate from the light source or the pitch between fine lines of uniform width monotonically decreases across the transparent plate from the light source or the width of the fine lines and the pitch between the lines monotonically increase and monotonically decrease, respectively, across the transparent plate in a direction from the light source.

Abstract: An optical indicator for industrial use comprises an elongate hollow casing with at least two partially transparent longitudinal bands and houses a support structure carrying at least two bulbs in correspondence with the bands and connected to electrical terminals at one end of the support structure. At least one electrical connector is coupled to the said end of the bulb-holder structure and is fixed in a first end of the casing. The bulb-holder structure is mounted in the casing so as to be removable through a second, open end of the casing and a closure member is fixed to the end of the structure opposite the connector. The closure member is adapted to be coupled to the second end of the casing with mutual lateral covering over a predetermined axial length such that, when the bulb-holder structure is removed from the casing, it is disconnected from the connector before the closure member is disconnected from the casing to an extent sufficient to allow access to the interior of the casing.

Abstract: An illuminating device including a first light source, a second light source and light guiding means, all provided behind an indicating panel having a first indicating area and a second indicating area formed adjacent to each other. The first light source is located at a position opposed to the first indicating area for illuminating the first indicating area. The second light source is so located as to illuminate the second indicating area through the light guiding means. The light guiding means is constructed of a transparent plate-like light guiding member for guiding light from the second light source to the second indicating area. The light guiding member is interposed between the indicating panel and the first light source. The light guiding member is capable of transmitting light from the first light source across a thickness of the light guiding member.

Abstract: A photographic flash lighting unit includes a tubular housing which is preferably hexagonal in cross-section and is defined by a plurality of elongate side faces, each of the side faces are provided with a coupling formation and are divided into a first plurality of faces having a male coupling formation, and a second plurality of faces having a female coupling formation adapted to matingly engage the male formations of like flash units, the faces are arranged upon the housing so that the male and female coupling formations alternate thereon. Locking members are provided on selected faces of the housing to prevent relative movement of matingly engaged housings. The housing is further provided with a flash lamp and a connector and associated circuitry to enable a photographic power supply to be connected to the housing for energization of the flash. An optional adapter cord allows the unit to be powered by power supplies of domestic as well as foreign manufacture.