Abstract: An LED light source for a lensed lamp is described. An LED chip sits in a hollow having a rectangular floor. A lower portion of the hollow has steep walls and accommodates the part of the chip that does not emit light. An upper part of the hollow has four side reflectors extending parallel to the sides of the chip and four corner reflectors. The hollow is formed by coining. The light source provides more uniform light than do previous arrangements having convergent lenses. The vertical viewing angle of the lamp is maintained throughout the whole of the horizontal viewing angle range of the lamp.

Abstract: A fusion-welding leg in a vehicle lamp such that the fusion-welding leg of a front lens as one of the plastic members constituting the vehicle lamp is vibration-fusion-welded to the joint portion of a lamp body as the other plastic member. The inside of the front end of the fusion-welding leg is made substantially perpendicular to the joint surface on the lamp body side, and the outside thereof is tapered off to the leading end thereof so as to form a tapered surface.

Abstract: The present invention provides a lighting unit with a reflecting mirror using a bulb, in which the reflecting mirror will not fall out of a base due to vibration or deterioration of an adhesive by aging. The lighting unit includes a reflecting mirror (1) having a reflecting part (3) at one end and a neck portion (4) at another end, a bulb (11) as a light source, and a base (12). The bulb (11) is positioned inside the reflecting mirror (1). An end of the bulb (11) is inserted into the neck portion (4) of the reflecting mirror (1), and the base (12) is fixed to the neck portion (4). Thus, the bulb (11), the reflecting mirror (1), and the base (12) are combined into one component. The maximum outer diameter of the bulb (11) is larger than an inner diameter of the neck portion (4) of the reflecting mirror (1).

Abstract: Image display apparatus incorporating an enclosure having substantially opaque, substantially reflective interior surfaces. A light source emits light rays within the enclosure. An image-bearing surface is mounted in a front portion of the enclosure. The image-bearing surface bears a predefined image having transmissivity and reflectivity characteristics which vary as a function of position on the image-bearing surface, such that a substantial portion of the image is substantially non-transmissive and substantially reflective, and the remaining non-substantial portion of the image is substantially transmissive and substantially non-reflective.

Abstract: A horticulture lighting system with at least two light tubes mounted in opposite directions within a hollow column to produce a 360-degree field of substantially parallel radiant energy. The column is adapted with a cooling air flow across the light tubes and a protective lens.

Abstract: A roadway luminaire is provided which includes a mast mount docking station securable to an end of a pole mast. The mast mount docking station includes a power plug electrically coupled to the power conductors. The luminaire includes a corresponding power plug which is electrically and mechanically coupled to the mast mount docking station via a twist-lock feature including mating keys and keyways in the docking station and luminaire, respectively. The luminaire includes several plug-in components such as a plug-in photoelectric cell, a plug-in starter and a capacitor press-fit into a molded cavity in the luminaire. The power plug of the luminaire is adaptable to be used with all international voltages. The twist-lock feature provides for a fool-proof mechanical and electrical connection to ensure that the correctly rated luminaire is connected to the supply voltage.

Abstract: A light assembly for providing a directed beam of light. The light assembly includes a specially configured lamp-reflector assembly which incorporates a high output lamp. The lamp-reflector assembly also incorporates a multi-faceted reflector for directing the beam of light within a restricted cone angle as it exits the light assembly. The lamp-reflector is housed in a flexible enclosure surrounding a translucent lens at one end and a power cord exiting the opposing end. The flexible enclosure is adapted for waterproof applications.

Abstract: A lighting fixture comprises a housing, an induction lamp inside the housing, a lens disposed to direct light away from the housing in a light pattern, and a light reflector inside the housing which reflects light in cooperation with the lens. The light pattern produced by the lighting fixture has a substantially uniform lateral illumination at a given radial distance from the center of the lens. The lighting fixture also provides a high level of directional illumination in the vertical direction when mounted to a ceiling. The lighting fixture can be surface or recess mounted. The lighting fixture can comprise a tee electrical conduit to allow through feed wiring from one fixture to another fixture. The lighting fixture is particularly suitable for use in conventional walk-in coolers and freezers used in supermarkets.

Abstract: A vehicle lamp includes an amber light bulb covered with a cup-shaped colorless transparent cap, thus emitting an amber light beam. A colorless, transparent, plain lens is employed. Furthermore, the inner surface of the cylindrical portion of the transparent cap is formed into a plurality of side steps, and the inner surface of the front end portion of the transparent cap is shaped into a Fresnel lens, and the outer surface of the front end portion is shaped into a plurality of fisheye lenses, which makes it more difficult to see the amber light bulb. Therefore, the vehicle lamp appears deep and glittering.

Abstract: A direct mounting lamp unit comprises a holder (4) each side of which is provided with a pair of terminal portions (5) having a shape such that a lead wire (2a) of a micro electric lamp (2) wound around the terminal portion (5) is substantially flush with a bearing surface (4a) of the holder (4). The lamp unit also comprises a color cap (3) that is provided with an engaging portion (3a) for engaging a lamp-receiving recess (4b) of the holder so that the micro electric lamp is kept vertically with respect to the bearing surface (4a) of the holder (4). The direct-mounting electric lamp unit having the above structure can be mounted on a circuit board (10) automatically by using a solder reflow bath in the same way as other electronic components, thereby improving productivity, though in the prior art, a direct-mounting electric lamp unit had to be mounted on a circuit board (10) by handwork.

Abstract: An illuminant warning arrangement includes a clothe body and a plurality of illuminating units provided on the clothe body. Each illuminating unit provides a transparent layer, a electric conducting board, a casing socket, a fastener, an LED, a battery box, and a manual switch. With the combination of the above elements, the illuminant warning arrangement can be assembled in matter of seconds. When the illuminant warning arrangement is in used, its displaying area is large enough to catch other drivers' attention from far away. When the illuminant warning arrangement is not in use, it can be folded into a compact package, so that it would not occupy unnecessary space in the trunk of the vehicle for easy storage.

Abstract: The vehicle lamp has a lamp body with an opening. A flange extends around a peripheral portion of the opening and provides a joining surface. A front lens has a rear surface from which a leg projects. The leg of the front lens is wedged into the joining surface of the flange of the lamp body.

Abstract: An auxiliary vehicle light comprises a housing having an opening in the front wall thereof, a lens permanently mounted on the front wall and sealingly closing the opening therein, and a reflector in the housing sealingly mounted about the opening in the front wall and cooperable with the lens to provide laterally adjacent headlight and parking/turn signal light bulb receptacles are removably mounted on the reflector for supporting light bulbs in the two light chambers, and the receptacles are accessible through an opening in the rear wall for removal from the reflector and which access opening is sealingly closed by a door.

Abstract: A reflector is provided which surrounds a light source that has emissions in both the visible and radio frequency ranges. The electrically conductive reflecting coating of the reflector is connected to the system electrical ground so that the radio frequency component is effectively shielded by the reflector. The visible component of the spectrum emitted by the source escapes the reflector cavity after at least one reflection from the reflector surface and forms the required beam pattern.

Abstract: A lamp holder includes a bowl-like lampshade having a top center hole, a glass cover covered on the opened bottom side of the lampshade and detachably secured thereto by clamps, a hopper-like mount having a flanged neck fastened to the top center hole of the lampshade and an outwardly extended top mounting flange, a socket cap detachably fastened to top mounting flange of the mount by screws to hold a lamp socket on the inside and a lamp bulb in the lamp socket within the lampshade.

Abstract: A lighting fixture includes a convertible shade which is supported relative to the light source to intercept light rays emitted by the light source in a selected direction or directions. The wall of the convertible shade has one or more wall inserts which can be selectively and easily secured to or detached from the convertible shade to alter the effect of the convertible shade on light rays from the light source which are directed at the location or locations of the wall insert(s) in the convertible shade without detaching the convertible shade from the shade supporting means. Preferably, the convertible shade is made of an opaque material while the insert(s) may be made of opaque, translucent or clear materials.

Abstract: The reflector lamp has a reflector body (1) having a neck-shaped portion (4) with an end face (5). An electric lamp (10) having a lamp vessel (11) with elongate end portions (12,13) and in which an electric element (14) is present, is mounted inside the reflector body (1), its first end portion (12) being fixed in the neck-shaped portion (4) and its electric element (14) being aligned with respect to the optical axis (3) of the reflector body (1). The lamp (10) is fixed by means of a first (30) and a second clamping member (40), which are initially movable with respect to the lamp (10) and one to the other, and which are rigidly secured one to the other after alignment of the electric element (14). The first clamping member (30) is kept positioned against the end face (5).

Abstract: A reflector discharge lamp in which a concave reflector has a front cover and in which a foil seal arrangement of hermetically sealed portions of a discharge lamp mounted therein can be advantageously prevented from reaching a high temperature. This is achieved by the discharge lamp being arranged such that a longitudinal axis of the discharge lamp coincides with the optical axis of the concave reflector by the end area of one of the hermetically sealed portions of the discharge lamp being located in an area of the concave reflector which is opposite the front cover. The end area of the other hermetically sealed portion projecting at least partially through and beyond an aperture in the front cover.

Abstract: In a vehicular lamp, a front lens is mechanically fastened to a lamp body by a fastening device formed astride the boundary between the seal groove-defining wall and the front lens during insertion of a seal leg portion of the front lens into a seal groove with a sealant provided therein. The fastening device includes stopping protrusions provided on the seal groove-defining wall of the lamp body and tongue-shaped elastic pieces that are provided on the seal leg portion and have openings. As the seal leg portion is inserted into the seal groove to mount the front lens to the lamp body, the tongue-shaped elastic pieces are pressed against the stopping protrusions and thereby elastically deformed outward. The stopping protrusions thereby smoothly engage with the openings so that the seal leg portion will not fall apart from the seal groove, without requiring a plate spring.

Abstract: A roadway luminaire is provided which includes a mast mount docking sation securable to an end of a pole mast. The mast mount docking station includes a power plug electrically coupled to the power conductors. The luminaire includes a corresponding power plug which is electrically and mechanically coupled to the mast mount docking station via a twist-lock feature including mating keys and keyways in the docking station and luminaire, respectively. The luminaire includes several plug-in components such as a plug-in photoelectric cell, a plug-in starter and a capacitor pressfit into a molded cavity in the luminaire. The power plug of the luminaire is adaptable to be used with all international voltages. The twist-lock feature provides for a foolproof mechanical and electrical connection to ensure that the correctly rated luminaire is connected to the supply voltage.

Abstract: In a lamp body and lens bonding structure and a lamp body and lens bonding method to form a vehicular lamp, a dielectric bonding agent (6) is applied to the joint part of a lamp body (1) made of polypropylene resin. The joint part of a lens (2) is engaged with the joint part of the lamp body (1) through the layer of dielectric bonding agent (6). Thereafter, the dielectric bonding agent (6) is solidified by high frequency dielectric heating treatment to fixedly bond the joint part of the lamp body and the joint part of the lens to each other.

Abstract: A lamp assembly includes a lamp capsule having a tubular lamp envelope, and a reflector disposed around the lamp envelope. The reflector defines an aperture for emission of light from the lamp capsule. The reflector has a reflecting surface facing the lamp envelope. The aperture has a dimension transverse to the longitudinal axis of the lamp envelope that is less than the diameter of the lamp envelope. The reflecting surface preferably has a diffuse reflecting characteristic. The lamp capsule may be a low pressure discharge lamp, such as a neon lamp. The lamp assembly may, for example, be used as a center high mount stop light in a vehicle.

Abstract: An LED lamp according to the present invention emits light approximately in all directions like a small filament lamp. The LED lamp is a light emitting bulb-shaped unit, and comprises an epoxy resin bulb-shaped portion; two leads of which one end is extended outside the bulb-shaped portion and the other end is embedded in the bulb-shaped portion; and an LED chip connected to the ends of the two leads and embedded in the bulb-shaped portion. The surface of the bulb-shaped portion of the LED lamp is formed in an appropriate process to be a frosted glass surface, a cut-diamond surface, a surface covered with small particles, or an optically-diffusing cap. Thus, a durable, non-fragile, and small power-consuming LED lamp can be obtained.

Abstract: A motorcycle turn signal translucent lens has a central opening formed therethrough. A decorative cover is secured to the lens via fastening means engaging the cover and the opening in the lens. The cover has a plurality of openings provided thereon, thus, allowing the lens to remain viewable. The lens is secured to a motorcycle turn signal housing by additional fastening means.

Abstract: A vehicle lamp assembly has an opaque housing portion and a light transmissive lens portion. The housing includes a peripheral channel for accepting a sealing adhesive and a complementary peripheral tongue on the lens portion. The bottom of the channel is characterized by a plurality of energy directors which contact the tongue and are locally upset by a ultrasonic weld apparatus to provide local welding between the lens and housing. The local welding provides fixtureless retention of the respective parts during the curing of the sealing adhesive.

Abstract: An EMI shielding lens for a lamp, e.g., an automotive lamp. The lens includes a transparent, unitary, polymeric lens blank and a thin, heat transferred grid layer including an electrically conductive grid pattern disposed on the lens blank inner or outer surface. The grid pattern may be formed from indium tin oxide or from a conductive, heat transferable, inks or polymer. The grid layer may also include colored or opaque indicia. Linear elements of the grid pattern are spaced apart by less than 1/2 .lambda. of the EMI to be shielded. Also discloseed is an electromagnetic interference shielded lamp assembly including an electrically conductive housing, a light source within the housing, the EMI shielding lens fixed to the housing, and grounding means. Methods for fabricating the lens and the lamp assembly are also disclosed.

Abstract: A light source, particularly suited for surgical and other medical illumination applications, includes an electrodeless lamp assembly, a reflector having the electrodeless lamp assembly mounted therein and high frequency power source for supplying high frequency power to the electrodeless lamp assembly. The electrodeless lamp assembly includes an electrodeless high intensity discharge lamp capsule including a light transmissive discharge envelope enclosing a discharge volume containing a mixture of starting gas and chemical dopant material excitable by high frequency power to a state of luminous emission. The luminous emission has a color rendering index greater than 85 and preferably has a color rendering index greater than 90. The luminous emission preferably has low energy in the spectral range of 800 to 1000 nanometers relative to energy in the visible spectral range.

Abstract: An LED sealing lens cap, comprising in combination a lens cap body defining a recess to forwardly receive an LED, a shoulder on the body to face rearwardly toward a mounting panel, and a seal carried on the body to face outwardly, and located proximate the shoulder.

Abstract: A portable general illumination lamp unit having very low power consumption (under 100 mA) and producing a high intensity light. A dual conductor wire protrudes from the lamp housing body to connect to a power source. The lamp housing has a housing body, a flush fitting lid and a downward facing lens. The housing body has an exterior surface suitable for light diffusion. A low power, high intensity light bulb is attached to conductors on the wire using insulated wire straps, and a strain relief member is molded onto the dual conductor wire. The strain relief member is fixed to the lid of the lamp housing and sealed in place with a waterproof epoxy, oriented so that the bulb will be positioned in the center of the housing body. The housing body receives the lid. The opposite end of the wire lead can connect for permanent mounting of the device, or attach to a plug appropriate for the power source desired. Alternatively, the dual conductor wire can connect to a switch and one or more batteries.

Abstract: A low-voltage spotlight for use in substitution for a mains voltage PAR38 spotlight includes a casing which houses a removable low-voltage halogen lamp and metal reflector and apparatus for stepping down the incoming mains voltage. A lampholder for the removable halogen lamp is mounted on a metal casing which acts as a heat sink and also as a conductor of heat to the outer surface of the casing for dissipation. The spotlight is completely sealed for outdoor use in conjunction with a weatherproof PAR38 lampholder.

Abstract: Low voltage discharge lamp assembly which has a plug-in base and, in some embodiments, includes a power supply as an integral part of the assembly. The electrode leads pass through a base cap to form contact pins for engagement with a socket. By controlling the orientation of the pins relative to the electrodes and discharge path within the lamp, the lamp is easily removed and replaced without disturbing the direction and focusing of the light it produces.

Abstract: A light for medical purposes has a lamp housing (11), at least one lamp (12) arranged therein, a reflector (16) arranged therein, and a light transmissive plate arrangement (13) closing off the lamp housing (11) towards the illumination field (14). The lamp housing (11) with the light transmissive plate (13) is closed off towards the exterior for reasons of hygiene and is formed from a material with a lower thermal conductivity than that of human skin, at least at those sites at which a contact by the operating person can arise.

Abstract: Automotive emblem lighting assemblies, and methods of making. One embodiment comprises a bezel mounted to a transparent/translucent lens, with junction therebetween which can be sealed. Viscous curable material is dispensed upon the lens rear and bezel. Bubbles within the viscous material are removed. A housing is bonded with the viscous material and bezel/lens. The curable material is cured and seals the assembly. A light source shines through the lens. The lens can have an emblem shaped recess or recesses. Part of the lens rear can be coated with substantially opaque material. A reflective-transmissive material coats at least part of the lens rear for light transmission/reflection. Diffusion can be by a diffusing agent in the viscous material, reflective surface on the light source, or diffusing material on the lens.Modifications: lens with no substantially opaque coating, an emblem shaped lens, reflective-transmissive material on the lens rear, and no bezel.

Abstract: An electric lighting device that uses a concave reflector to collect and concentrate the light emitted by a plurality of luminescent light sources. The cooperating relationship between the orientation of the light sources and contour of the reflector increases the parallelism of the light beams projected from the device so that they can combine to form a composite beam. The spatial relationship between the light sources and the inclusion of a light transmitting medium reduce overheating and increase the efficiency of the device.

Abstract: A high reliability, low power lamp for use in illuminating traffic signal indicators, comprising a "serpentine grid structure" comprising a first and a second overlapping neon light source. The two neon light sources are placed in close proximity to one another, thus allowing each light source to be illuminated more rapidly due to the reduced length of each tube and the interaction of each tube with the other. The physical layout of the indicator is preferably designed to enhance the operation of the neon tube by causing heat generated by the power supply to raise the temperature of the air surrounding the neon tube.

Abstract: A light source assembly has a housing and a bulb unit disposed in the housing. The housing is made of an electromagnetic shielding material. The bulb unit is composed of a reflector made of an insulating material, a bulb accommodated in the reflector, a connector connecting the bulb to a control circuit and fixing it to the reflector and light transmitting windows formed in the reflector. The bulb is disposed in the reflector so as to cross the axis of the light transmitting windows. The connector projects to the outside from the reflector to be coupled or decouple with a connector of the control circuit.

Abstract: A vehicle head lamp in which an outer cover is provided in front of a light-distribution control unit, and substantially horizontally extending decorative lines are formed by glare-reducing steps on the inner surface of the outer cover.

Abstract: In brief, the objects and advantages of the present invention are achieved by a reflector for an ornamental luminaire. The reflector includes a member formed of a metal material, the metal member having a predetermined thickness and being perforated with spaced apart apertures of a selected diameter and selected density. The metal member has a predefined reflector shape with the spaced apart apertures and the predefined reflector shape arranged to provide control of both an upper illumination distribution and a lower illumination distribution. The reflector metal member includes a plurality of positioning portions arranged for press-fit engagement within the ornamental luminaire. A hydroforming technique is used to form the metal member into the predefined reflector shape. The reflector is trimmed via a stamping process to a desired diameter and to provide the plurality of positioning portions in a precompression state.

Abstract: A headlight-light unit for a vehicle comprises a headlight having a headlight housing with a headlight outlet opening and a headlight cover member covering the headlight outlet opening, a light adjoining the headlight and having a light housing with a light outlet opening and a light cover member closing the light outlet opening. The headlight cover member and the light cover member are formed as a single cover element, a frame-like element connecting the cover element with the headlight housing and having a portion which extends outwardly beyond the headlight housing and forms the light housing.

Abstract: An elongated light fixture is disclosed which includes an elongated hollow transparent tube and a lens panel slidably mounted in the housing to disperse light and/or provide direct light from the fixture. An elongated reflector is mounted in the housing above the lens panel and has one or more light bulbs lighted thereon. The tube has open ends which are closed by caps secured thereto.

Abstract: An arrangement for illuminating objects wherein a large number of objects are rapidly and continuously transported past one or more stations, each illuminated by a cylindrical, integrating Lambertian reflecting/diffusing cavity having one or more like light sources therein so as to generate and project a highly intense, highly uniform and highly diffuse beam of illumination, while incorporating optical guide means to couple said illumination beam to the face of the objects at said station and to couple the reflected image of the object back to the cavity.

Abstract: The light fixture comprises a pod suitable for being embedded in the ground, and housing a light source, and a cover provided with at least one opening containing an optical unit facing the light source. The optical unit is sealed relative to the cover by a gasket which fits snugly around the perimeter of a base portion of the optical unit and which is compressed by means of a presser member applied against a bottom surface of the optical unit. The cover provides a housing designed for the gasket and defined by contact surfaces comprising a wall facing the perimeter of the optical unit and a top abutment for the gasket parallel to the mean plane of the cover.

Abstract: A navigation light assembly for a marine craft includes a base mountable to a deck or other suitable surface of a marine craft, a hemispherical lens which is sealingly attached to an interior wall in the base to form a water-tight space for containing a lightbulb and electrical contacts, and a cap which is attached to the base to securely capture the lens therebetween. A reflector disposed within the water-tight space of behind the lightbulb redirects light outward from the back of the assembly to provide efficient utilization of light emitted from the lightbulb to achieve better visibility of the light from a greater distance using a smaller lightbulb and light assembly. The efficient utilization of light from the lightbulb is further improved by employing a hemispherical Fresnel lens which focuses light along the horizon. The light assembly is easily mounted to the deck and assembled, and is free of exposed fasteners used to attach the assembly to the deck of a marine craft.

Abstract: A quartz halogen outdoor floodlight assembly, having an improved lamp, reflector, and housing therefor for increased adjustability and overall performance. The housing comprises a two component unit, having upper and lower separable housing members, interconnected through a quarter turn fastening system comprising at least one key extending from the lower housing member, a receiving keyway formed in the upper housing member, and a camming ramp formed internally in the upper housing member. A lens in secured to the face of the upper housing member by a sealing adhesive, which simultaneously retains a reflector within the upper housing. A lamp operatively secured within a socket disposed in the lower housing member is operatively positioned in the reflector upon assembly. The lamp preferably includes an internal reflector which aligns with the external reflector to increase longitudinal light output.

Abstract: A headlamp assembly comprising a reflector defining an open front end, a lens adapted to close the open front end of the reflector to form a lamp chamber, a bulb mounted in the lamp chamber, and a mounting structure. The reflector and lens define respective annular flange portions which are seated together at an interface and the mounting structure is formed as an injection molding including an annular main body housing portion surrounding the reflector and an annular seal portion at the inner periphery of the main body portion encapsulating the seated together flange portions so as to seal the interface between the flange portions and seal the lamp chamber. Sealing of the lamp chamber is further facilitated by the provision of a series of annular grooves in the reflector flange portion and a series of annular ribs in the lens flange portion sized to fit in the respective annular grooves in the reflector flange portion.

Abstract: A headlamp for a vehicle includes: a lamp unit including a reflector having a front opening, a lens covering the front opening of the reflector, and a light source bulb disposed within the shell formed with the reflector and the lens; and a lamp body supporting the lamp unit therein, the lamp body including an inward projecting portion, wherein the lamp unit abuts on the inward projection portion.

Abstract: In a vehicular lamp with a waterproof cover, a cylindrical upright wall extends along the circumferential edge of the opening of the lamp body into which a bulb socket supported by the reflector is inserted. The waterproof cover for waterproofing the opening is made of a watertight elastic material. The inner portion of the waterproof cover is in close contact with the circumferential surface of the reflector or a bulb socket. The outer portion of the waterproof cover is fitted to the upright wall in a state such that the upright wall is sandwiched by the outer portion.

Abstract: A housing for an underwater lighting fixture includes a wet niche formed from plastic and provided with three alternative grounding pathways. A conductor strap is attached to the niche by a threaded lug which extends through the strap and an adjacent wall of the niche to permit an internal ground wire and an external ground wire to be connected to the strap. As a further grounding assurance, the lighting fixture is grounded through a bracket which attaches to the conductor strap. The bracket also serves as a current collector to receive electrical charge from the surrounding water.

Abstract: A long, thin illuminated line of light is provided for highlighting components in an automotive dashboard or interior such as a cup holder or gearshift console. A point light source such as a surface mounted LED or incandescent lamp is located at one end of a light guide. An arcuate rear reflecting surface of the light guide causes total internal reflection of the light from the point light source and produces a uniform light display at a front viewing surface. The line of light can fit into deep recesses of a plastic molded console with minimal spacing (e.g., of only about 0.10 inches) between walls. The line of light can also be used for aesthetic or functional displays such as for consumer electronic equipment and industrial controls.

Abstract: A luminaire includes a reflector in a housing, a lampholder for accommodating an electric lamp parallel to a light-emission window of the housing and to second sides thereof, and a light transmissive pane closing the window. Light-screening lamellae are present near the window, transverse to the main direction of the lamp. The luminaire has lamellae in regions adjacent first sides of the window, only; a central region of the window being free of lamellae for allowing easy replacement of the lamp through the central region not occupied by the lamellae. In an embodiment of the luminaire the lamellae are not linked to the pane. The luminaire allows for an easy replacement of the lamp and easy cleaning of the pane. An increased light output is obtained, too.