Abstract: An illumination device for an interior space, such as that of a motor vehicle, for example, has a light source (2) and an opposing reflector system (3) located at a distance across the interior space, wherein the reflector system includes a reflector unit having multiple reflectors (8, 13, 14, 15, 16) each capable of being brought into a position in a beam path (7) of light from the light source (2). The light source (2) can be placed in a center control panel (4) of the motor vehicle, while the reflector system (3) can be placed on a vehicle ceiling located opposite the center control panel (4).

Abstract: An optical system for an image projector luminaire includes a variable-focus lens having a depth-of-field adjustable as to location along an optical axis, and two carriages each supporting at least one image pattern generator at separate locations along the optical axis, at least one of those carriages being adjustable as to location along the optical axis. The system is operable to bring either or both image pattern generators into focus. Each carriage may support pattern generator exchanger mechanisms for selecting one of a plurality of available patterns, and may also rotate the selected pattern. The movable carriage, the lens, and the pattern exchanger mechanisms may all be motorized and operable by remote or computer control.

Abstract: A highly compact, light weight automated luminaire is disclosed having a head unit mounted on a support structure which provides pan and tilt of the head unit. The latter includes beam controlling optics providing precise control over beam parameters including color. Groups of the instruments are remotely controlled from a digital controller such as a PC connected by cable or a wireless link to the instruments. The lights each include processors for processing comands from the digital controller. By reason of its light weight and compactness, the luminaire is suitable for many applications barred to conventional automated lighting fixtures.

Abstract: A luminaire for a fluorescent bulb having a support unit for a fluorescent bulb which is movable to be adjustably positioned with respect to the opening to narrow or broaden the width of the beam of light emitted. The support unit has pairs of pivotable reflectors and adjustment mechanism for positioning the angle of the reflectors to reflect light in the desired manner. The adjustment mechanism includes pivotable mounts having gears wheels which are turned by a worm gear on an adjustment rod. The movable reflectors can be interchanged to present different surface contours and spectral coatings.

Abstract: An apparatus and method of minimizing glare from a lighting fixture using reflective glass as a lens and where the fixture is configured or desired to be configured to converge light to the same point in space. The method aims a top-most or bottom-most portion of the main reflector so that light reflected from it travels perpendicularly to the lens. Remaining portions of the main reflector either automatically adjust to the top-most or bottom-most portion or are adjusted so that glare is minimized by reimaging of the light source caused by reflectance from the glass lens in a manner that such reflectance is blocked wholly or partially by the light source and/or the holder of the light source and/or the supporting structure positioning the holder of the light source in place inside the housing. The apparatus according to the invention includes a lighting fixture having a housing, a light source and reflector in the housing, and a glass have reflecting properties on the housing.

Abstract: A lighting fixture for control of a concentrated high intensity light beam to a relatively distant target location. A reflector end high intensity light source are enclosed within a housing. The light source is moveable with respect to the reflector. The reflector has first and second portions which are moveable with respect to each other. The movement between portions of the reflector and the movement of the light source relative to the reflector allow a variety of different beam configurations and orientations from the fixture.

Abstract: A decorative illuminating mobile apparatus includes a support member that has an engaging surface that fits a generally flat adjacent anchoring surface such as a ceiling, floor, wall or the like. A first swivel member extends away from the support member. A plurality of separately rotatable appendages are connection sequentially together by a series of addition swivel members that space each appendage a part from another adjacent appendage and away from the support member engaging surface. This arrangement stacks the rotatable appendages vertically so there is a highest appendage and a lowest appendage with a plurality of appendages therebetween for example. At least some of the appendages include a light source that is powered by electricity. An electrical supply is provided for illuminating each light source, the electrical supply including rotational light electrical supply connection at the swivels.

Abstract: A strobe device is provided, including a light source and a reflector which reflects part of the light emitted from the light source. The reflector is provided with a reflecting surface that is shaped to form virtual images of the light source behind the reflecting surface.

Abstract: A louvered light control controls the light emitted by a standard drop-in fluorescent light fixture. The fluorescent light fixture is removed and a louver frame containing first and second louver assemblies stacked within the louver frame is inserted in place of the lens. The louver assemblies are oriented so that the louver vanes of the first louver assembly are at a right angle with respect to the louver vanes of the second louver assembly. Adjusting means for adjusting the movable vanes of the first and second louver assemblies between a relatively open position and a relatively closed position permit control of light emitted by the fluorescent light fixture.

Abstract: An improved headlight having variable light distribution is provided, where said headlight comprises a reflector divided into an upper movable light distribution reflector and a lower fixed light distribution reflector by a horizontal line located 10 to 30 mm above the optical axis of the light source and the reflector, of which said movable light distribution reflector is rotatable around a vertical rotary axis practically crossing the optical axis of the light source and said fixed light distribution reflector is designed to reflect 50 to 60% of the total quantity of light applied to the reflector. With such an arrangement, the swerving side of the automobile is satisfactorily illuminated by the movable light distribution reflector while a desired frontal light distribution pattern of the headlight is ensured by the fixed light distribution reflector because the two reflectors provide a substantially equal quantity of light.

Abstract: A headlamp for vehicular use including a rotatable shade composed of a right shade and a left shade and which constitutes a clear-cut line vertically moving adjusting device for vertically moving and adjusting a clear-cut line of a low beam produced by the headlamp, a curved road detecting device for detecting a condition of a curved road in front of the vehicle, and a main optical axis lateral direction tilting adjusting device. The rotatable shade is rotated by a predetermined amount in accordance with the information of a curved road detected by the steering sensor so that the clear-cut line is vertically moved and adjusted. Further, the reflector (and the bulb mounted thereon) is laterally slid by a predetermined amount so that the light distribution pattern and the "hot zone" are laterally moved and adjusted. Accordingly, the visibility, especially the visibility on the steering side, is improved when the vehicle travels on a curved road at either low or high speed.

Abstract: A high intensity light projector for stage, architectural and similar applications includes a controllable image quality projection gate providing advanced visual effects. The projection gate, capable of selectively scattering or transmitting incident light, may be constructed of an array of scattering liquid crystal material in combination with infrared and ultraviolet reduction means which provide in the high intensity beam, a stable thermal environment by minimizing the absorption of light by the projection gate. Additional thermal efficiency is provided by supplemental cooling means. Color control is also provided in the form of dichroic filter wheels forming cooperating adjustable low, high and band width filters including saturation control. A color measuring feedback sensor is also provided. An intensity measuring feedback sensor controls a spatially-modulated, variable-density, reflectively-coated dimming wheel. A programmable gobo system has provisions for gobo selection, orientation, and rotation.

Abstract: An illuminated colored display device having a pair of counter rotating translucent members bearing colored patterns thereon, and a light distorting, magnifying and reducing, member surrounding a source of light, such that when viewed from a fixed location the display device a changing display of colors and shapes is observed.

Abstract: Overlapping lenses for use in a light fixture provided to project a beam of light in a first beam shape having a first cross-sectional geometry. A first lens device is supported in the fixture and movable into a position to interrupt the beam of light for selecting beam shape by altering the first projected beam shape from the first cross-sectional geometry to a second cross-sectional geometry different from the first geometry. The first lens device includes at least one lenticular lens element having lenticules oriented in a first direction. A second lens device, separate from the first device, is supported in the fixture and movable into a position to interrupt the beam of light for selecting beam shape by altering the second projected beam shape from the second cross-sectional geometry to a third cross-sectional geometry different from the first and second geometries.

Abstract: A fiberoptic illumination system having an attenuator with a "multiple wedge" aperture that more uniformly attenuates the light beam striking the fiberoptic without changing the color temperature of the light beam or affecting the exit divergence angle of the light beam. The system includes an optical housing design having orthogonal lights paths that allows two fiberoptics to be illuminated from the same bulb, two bulbs located in primary and back-up positions, respectively, mounted on a rotating carousel and a retinal protection filter that filters out wavelengths of light harmful to the retina.

Abstract: An apparatus and method of lighting which produces light of highly controlled nature and which makes sufficient use of the light including a light source, a primary reflector placed directly at or near the light source and a secondary reflector which receives light from light source and from the primary reflector and directs it to a target area.

Abstract: A variable light modifier provides rapid beam deflection and flipping with a minimum of noise, power consumption and heat generation. In one embodiment of the invention, a dual-sided reflector is pivotable along orthogonal axes by pan and tilt mechanisms. The pan and tilt mechanisms are driven by pan and tilt motors, one or both of which remain stationary with respect to the yoke. The variable light modifier can be used to deflect light beams generated by one or more light sources and can reflect the light from one or both reflective surfaces of the reflector.

Abstract: A lighting device for an observation/image pickup apparatus capable of satisfactorily illuminating a surface of an observed section of a specimen sample for observation irrespective of whether a fine roughness is provided on the specimen surface. Illumination control slit members for laterally projected light, deflected oblique light, vertically projected light, and light composed of laterally projected light and vertically projected light, are provided, and selectively face an illumination light introducing section, to thereby convert illumination light (introduced through the illumination light introducing section) into any desired one of: laterally projected light, deflected oblique light, vertically projected light, and light composed of laterally projected light and vertically projected light, resulting in a surface of an observed section of a specimen sample being illuminated with the converted light.

Abstract: The present invention is directed to a method of simulating a pseudosun using a solar simulator. In the present invention the collector and lens of a lamp are designed to properly focus a plurality of light beams onto a segmented turning mirror. The path of light rays are traced from the lamp to the collector and then finally to the lens to control the solid and tangential magnification of the solar simulator. The segmented turning mirror is located at the focal point of the light beam and redirects the light into a vacuum chamber.

Abstract: The present invention discloses a decorative fiber optic lamp including an enclosed base attached to a lamp shade. A motor has a rod connected to a special effects wheel located directly above a light source. The motor is connected to a transformer which is in turn connected to a power source for operating the motor to thereby rotate the wheel. An elongated fiber plug is located immediately above the light source and extends within the lamp shade. Light transmitters are bundled or joined within the fiber plug and extend from the center of the fiber plug through the top end of the fiber plug and at that point, expand outward or fan out in all directions into the lamp shade. Also, the fiber strands extend downward, thereby forming a tree-like appearance. Light is illuminated from the light source and modified as it travels through the special effects wheel and into the bottom of the fiber plug. As a result, special effects are generated within the lamp shade, thereby creating a decorative lamp.

Abstract: A radio wave signal is transmitted from a radio wave transmitter according to a command from a central control unit, and a supersonic wave is transmitted from a supersonic wave transmitter held by a moving object according to this radio wave signal. A time counter in a supersonic wave detecting device determines the time required from the transmission of the radio wave signal to the detection of the supersonic wave. A coordinate position of the object is calculated on the basis of the thus-obtained time data from a plurality of the supersonic wave detecting devices and positional data of the supersonic wave detecting devices to control the lighting direction of a lighting projector according to a command signal from the central control unit referring to a positional data of the lighting projector.

Abstract: A luminaire assembly has a housing including a number of circumferential slots in which the handles of shutter blades are arranged to be slidable. The edges of adjacent slots are radially overlapped around the circumference of the luminaire housing so that each handle may be manipulated over an angular range approaching or exceeding 360/n, where n is the number of slots and/or shutter blades.

Abstract: An automobile headlamp in which an illumination angle of the headlamp can be adjusted laterally by pivoting a reflector right to left with respect to a lamp body. A leveling device for measuring the lateral inclination of a reflector is held between the reflector and a lamp body. The leveling device includes tubular holders which are fixedly fitted into the holder fitting hole of the lamp body and extend longitudinally, a sliding rod which is slidably fitted into the holder, has its leading end urged to abut against the rear side of the reflector and slides in the holder in association with the inclination of the reflector, and graduations provided between the sliding rod and the holder. Flanges are formed on the holder by fixing them to the peripheral edge of the holding fitting hole with screws, whereas vertical walls are formed at the peripheral edge of the holder fitting hole of the lamp body. The vertical walls engage the respective flanges in the peripheral direction and surround the holders.

Abstract: A luminaire has at least four reflectors which may be individually pivoted about an axis provided by a screw that the distribution of light emitted by a lamp located within the envelope of the reflectors may be altered and fixed to suit the environment that the luminaire is to illuminate.

Abstract: A color cross-fading system for a luminaire includes two filter disks or strips each provided with a multi-layer filter coating to provide a dichroic filter effect. In each case the thickness of the coating layers varies continuous along a gradient axis of the filter disk or strips. One disk acts predominantly as a long wave pass filter and the other act predominantly as a short wave pass filter, but each disk has an essentially "complex" characteristic enabling a very wide range of different colors to be obtained by cumulative subtractive filtering, by varying the positions of the two disks or strips relative to an optical axis.

Abstract: A gate for a lamp which is particularly suited for illuminating rectangular objects comprises a holding element defining a light-passage opening which can be mounted on the lamp. Four gate wings are mounted on the holding element about the light-passage opening for defining a gate opening having substantially the approximate shape of an even-leg, or isosceles, trapezoid.

Abstract: A gobo holder for a lighting system is provided which includes a housing for removably receiving a gobo therewithin, the housing having first and second ends and being positioned in the beam of light such that light enters the housing through the first end, passes through the gobo and exits the housing through the second end, a support on the housing for supporting the gobo in the housing, the support being positioned such that the beam of light passing through the gobo is unobstructed by the support, and a spring retainer supported by the housing and in contact with and resiliently biasing the gobo into contact with the support, the spring retainer being positioned such that the beam of light passing through the gobo is unobstructed by the spring retainer. The gobo holder is particularly advantageous in that it is capable of securely retaining gobos of various thicknesses in position during use while permitting easy and quick replacement of the gobos during lighting operations.

Abstract: The picture toy includes a housing, a first opaque plate including a first array of apertures, a second opaque plate including a second array of apertures, and a plurality of light pipes. The picture toy is assembled such that each aperture of the first array is axially aligned with a corresponding aperture of the second array. Each light pipe includes a rear section and a front section which are respectively fitted into one of the apertures of the first array and its corresponding aperture of the second array. The rear section of each light pipe further includes an opaque end surface which substantially prevents light from entering the picture toy through the rear section when the light pipe is slid into a raised position. Illuminated indicia are created by selectively depressing the light pipes so that light may enter the rear section of the light pipe and propagate therethrough.

Abstract: A projection headlamp for vehicles has a substantially elliptical reflector 14, a light source (bulb) located at the first focal point F1 of the reflector 14, a projection lens 16 disposed in front of the reflector 14, and a shade 20 located at a position near to the second focal point F2 and the focal point of the projection lens 16. The shade 20 partially intercepts light beams going from the reflector 14 toward the projection lens 16. The shade 20 is allowed to turn about the horizontal shaft 23 of the reflector 14 to adjust the beam distribution pattern. The shade 14 includes right and left shades 21 and 22, which are separated and horizontally extended when seen from the point substantially right under the optical axis L, and are allowed to independently turn about the horizontal shaft 23.

Abstract: An automotive-type projection headlamp having a substantially elliptical reflector, a light source (bulb) located at the first focal point of the reflector, a projection lens disposed in front of the reflector, and a shade located at a position near the second focal point of the reflector for partially intercepting light passing from the reflector toward the projection lens. The shade is rotatable about a horizontal support shaft, and has a circumferential surface spirally shaped as seen in a longitudinal sectional view, so that the distance from the center of rotation of the shade to a point on the circumference thereof gradually varies. The vertex of the shade is vertically varied by turning the shade about the horizontal support shaft, thereby controlling the distribution of the output light beam.

Abstract: An automated lighting instrument according to the present invention includes multiple motorized parameters and operates at a low noise level with improved thermal management devices such as a reflector coated with a cold mirror film, a metallic heat sink, a housing with ventilating holes, and thermally isolating motor mounts. The improved thermal management devices provide the basis for an improved method for managing the thermal characteristics of the automated lighting instrument of the present invention.

Abstract: A lamp used in photography and television comprising a housing having a filter cavity into which an optical element provided with a handle can be introduced, the housing having first and second shafts situated between two sidewalls of a holding device and extending in a longitudinal direction of the housing and bridging the filter cavity, the handle of the optical element is provided with first and second recesses which are arranged to engage the first and second shafts, respectively, the first shaft being surrounded by the first recess of the handle to allow the optical element to swing about the first shaft from a working position, in which the optical element is located within the filter cavity, into a second position in which the optical element is removed from the filter cavity and the second recess engages the second shaft, and a locking mechanism is provided for retaining engagement of the second recess with the second shaft when the optical element is in the second position.

Abstract: A lighting instrument having pivotable color filters arranged in a substantially radial arrangement with respect to a projected light beam. Multiple sets of such filters are spaced along the axis of the light beam to vary the color of the light beam emitted from the instrument. A motorized mechanism rotates each filter of each set in synchronization with each other and independently with respect to filters of the other sets. The filters may be rotated by the motorized mechanism through flexible coupling mechanisms. The filters also may be positioned to pass unfiltered light to vary the saturation of the light beam.

Abstract: This mechanical joint allows relative rotation of two articles (one may be a stationary fixture), on an arbitrary axis. The joint has as much angular-rotation range as a hinge, but as many degrees of freedom as a ball-and-socket or universal joint. It allows transmission, between the objects, of force or flux (e.g., of electricity, gas, or liquid), or both. It can be used as an applied-force or motion sensor, varying electrical contacts or conductivity in response to relative motion or force applied between the articles. In one form the invention is simply a mechanical joint formed of two closely interlocked toroids. The minor cross-section of each toroid is sized to just fit through the central aperture of the other; there is a connection point on each toroid for attachment of one article. By adjusting closeness of fit, a designer can impart to the device a wide range of desirable frictional properties.

Abstract: A lamp shade including a plurality of light deflecting elements. The light deflecting elements are rotatably mounted so as to be independently rotated with respect to the frame and one another. In one embodiment the light deflecting elements are mounted end to end to allow vertical variation in light intensity and direction. In another embodiment the light deflecting elements are both horizontally and vertically disposed to increase versatility in both appearance and lighting effect. Thus, the lamp shade which advantageously allows the light to be directed in accordance with the particular area in which the light fixture is placed, both to shield the user's eyes and to direct light where it is most needed.

Abstract: An assembly for supporting a neon tubing comprises a length of extrusion and at least first and second lenses supported in the extrusion. Preferably, the extrusion includes an angled bottom member having first and second legs. First and second wall members extend transversely to the first and second legs, respectively, of the angled bottom member, with each of the first and second wall members having a medial portion and an end. The extrusion further includes a service rail extending at an obtuse angle from the end of each of the first and second wall members, and the service rail includes a tapered medial portion and a retaining flange. Each of the first and second lenses are supported in a receving channel of the extrusion and has a predetermined length less than the predetermined length of the extrusion.

Abstract: A shade control arrangement comprises a shade panel having inner and outer edges with an attachment clamp or attachment clips at the inner edge and additional clips at the outer edge. The outer clips can be used to hold the edge of a gelatin sheet or a perforated sheet to stretch the sheet across a source of light to which a pair of panels is connected using the inner clips or clamp. The clamp comprises inner and outer jaws which form a pocket that can be closed with a screw, at least one of the jaws being pivotally connected between the legs of a U-shaped fork that is detachably connected to the shade panel near the inner edge thereof. A flexible shaft is detachably connected to the clamp. A similarly structured clamp can be used to capture the edge of a flexible sheet that contains a plurality of parallel bend troughs so that the sheet can be bent into a varity of shapes.

Abstract: A color changer (20) comprising a component hue saturation filter (30) including an elongated flexible substrate (32) having a surface with a gradient axis (GA) and which includes a graded portion (G) supporting a uniform concentration of a selected hue filtering material (50) distributed in a continuously graded average density in beam-size areas around points along the gradient axis. The component hue saturation filters may be embodied in separate substrates positionable in parallel planes to be intersected serially by a beam of light. Alternately, dual-hue filters (68) may be formed by two primary hue component filters embodied in respective substrates each also embodying duplicate third primary hue component filters producing the same effects. Saturations of each selected hue of light appear evenly distributed in the output beam without the need for color components to be further commingled.

Abstract: A lighting instrument having pivotable dichroic filters arranged in a substantially radial arrangement with respect to a projected light beam. Multiple sets of such filters are spaced along the axis of the light beam to vary the color of the light beam emitted from the instrument. A gearing mechanism rotates all filters of each set in synchronization with each other and independently with respect to filters of the other sets. The filters may be positioned to pass unfiltered light to vary the saturation of the light beam.

Abstract: In an illuminating apparatus for projection purposes, in particular a film projector or television image projector by the eidophor system, four condensers are located around a source of light in a cube-shaped housing, the condensers reproducing via the use of deflecting mirrors, an image of the light source on several, spatially adjacent imaging mirror segments, which in turn reproduce the condenser images superimposed upon one another, via an output mirror, on an image aperture of the projection optics.

Abstract: A protective, reflective, light diffusing sleeve is adapted to mount on a light element to protect the element and intercept light emitted therefrom. The sleeve comprises a tube adapted to telescopically receive the element and a reflecting member carried by the tube for reflecting light emitted from the element. The tube is adapted to mount on the element for free rotation relative thereto to move the reflecting member about the element to control the direction of reflective light. The sleeve further comprises an element carried by the tube opposite the reflecting member for diffusing light reflected therefrom. The diffusing element comprises a field of prisms formed on and extending along a longitudinally extending portion of the tube.

Abstract: A lighting apparatus is provided which comprises a color disc capable of transmitting light therethrough and arranged within a housing having an opening. The color disc has a planar surface parallel to the opening, and a large number of subdivided sections defined on the planar surface. The subdivided sections are individually colored in one of a plurality of colors such that, when viewed as a whole, the planar surface has a plurality of identical coloration patterns each consisting of the subdivided sections of the same color and that any adjacent ones of the coloration patterns are different in color from each other. A shutter disc is arranged between the color disc and the opening and has a large number of windows for permitting only those subdivided sections forming one of the coloration patterns to be exposed to the outside of the housing when the shutter disc is at a predetermined rotational angle position.

Abstract: A light fixture for providing an aesthetically pleasing multi-colored pattern of illumination is disclosed. The light fixture comprises a housing for mounting a light bulb, a plurality of dichroic filters positioned within the beam of the light bulb, and a mounting fixture for securing and positioning the dichroic filters. Each of the dichroic filters will typically have different optical properties such that the reflected and transmitted light from each dichroic filter contributes a different color to the pattern. A second embodiment having an adjustable filter positioning means is also disclosed.

Abstract: Spectral filter means in which filter elements have elongated planar surface areas covered with patterns of filtering material. Filter elements are independently movable parallel to their respective surface planes to positions where a given density pattern of filtering material is intersected by a beam of light and filters a given component of the light. Separate filter elements for each of the primary colors and an additional element for dimming all colors are used to control the color and intensity of a beam of light.

Abstract: A lamp includes a bulb that is held within an openable housing. When the lamp is turned on, the bulb gradually lights and the housing gradually opens to expose the bulb. When the lamp is turned off, the housing closes around and thereby conceals the bulb. Methods for opening the housing include a sliding piston system, a cam and lifter system and a gear and rack system. When the lamp is turned on or off, music may also be played or other such sounds generated.

Abstract: A high intensity fiber optic lighting system is described utilizing an incoherent light source, e.g. a xenon arc lamp having a pair of aligned electrodes positioned on the optic axis of a non-spheric reflector such as a parabolic reflector so that the forward electrode will not obstruct the transmission of light from the light source and reflector. The arc of the lamp is located at the focal point of the reflector. A condensor assembly which can comprise a pair of planoconvex lenses is positioned to receive incident rays from the reflector and direct them to a focal point located at the polished entry end of a bundle of optic fibers composed of a plurality of peripheral fibers surrounding a central fiber, all held together at the focal point of the condensing lens.

Abstract: A variable beam floodlight fixture is provided for simply and quickly changing the width of the beam by means of a single operating lever which controls ganged, multiple, pivoted reflector sections. Pivoted reflector sections are provided on opposite sides of a fixed central reflector, and the multiple sections on each side simultaneously pivot in different amounts under control of the operating lever to provide a uniform beam at the various angles available from the narrowest beam to the widest beam attainable from the fixture.

Abstract: A stage lighting unit including a beam former and beam redirector. The beam redirector allows for the remote control of beam over a large expanse of the stage.

Abstract: A headlight device including a movable member connected to a stationary supporting member at spaced apart three points, at two of said three points said movable member being connected respectively to the stationary supporting member through aiming mechanisms which enable to change the space between the supporting member and the movable member respectively. At least one of the aiming mechanism comprises an adjusting rod and a gear unit, and the gear unit includes a casing mounted on the supporting member, a worm gear, a worm wheel meshing with the worm gear, a pinion gear co-axial with the worm gear, a driving gear meshing with the pinion gear, with the axis of the driving gear being arranged orthogonal to the axis of the worm wheel, and an actuating rod connected to the driving gear and extending through the casing.

Abstract: The fluorescent lamp device has reflecting plates, its body is made by direct extrusion, and it can be cut into any desired length to match with straight-type fluorescent tubes of any length specification, and tube holders, one each at each end of the body of the device; by means of the attachment of light reflecting plates and glare-proof plates one can increase the intensity of downward straight light by 1.7 times and substantially preclude damage caused by glare of light.