Claims
- 1. In combination with a room ceiling and an adjoining vertical light-reflective wall, a peripheral lighting arrangement, comprising at least one flush-mounted light fixture for producing monosymmetrical light distribution recessed in said ceiling, spaced in close proximity apart from said wall; said spacing beng .3 to .5 of the distance from said ceiling to the elevation below at which the optimum illumination is desired, said elevation below said ceiling at which the optimum illumination is desired being located in the lower vertical one-half of the room, and having a main light distribution pattern directed downward from said fixture toward said wall, said light distribution pattern being at an angle between 30.degree. and 70.degree. to said ceiling, the impinging and reflected light to and from said wall producing an average contrast rendition factor in the work task area of the room in excess of that produced by a substantially identical peripheral lighting arrangement involving one or more light fixtures producing axially symmetrical light distribution.
- 2. In combination with a room ceiling and first and second adjoining light-reflective walls tending to a corner, a peripheral lighting arrangement, comprising:
- at least one first flush-mounted light fixture for producing monosymmetrical light distribution recessed in said ceiling, spaced in close proximity apart from said first wall, said spacing being 0.3 to 0.5 of the distance from said ceiling to the elevation below at which the optimum illumination is desired, said elevation below said ceiling at which the optimum illumination is desired being located in the lower vertical one-half of the room, and having a main light distribution pattern directed downward from said fixture toward said first wall, said light distribution pattern being at an angle between 30.degree. and 70.degree. to said ceiling; at least one second flush-mounted light fixture for producing monosymmetrical light distribution recessed in said ceiling, spaced in close proximity apart from said second wall, said spacing being 0.3 to 0.5 of the distance from said ceiling to the elevation below at which the optimum illumination is desired, and having a main light distribution pattern directed downward from said fixture toward said second wall; said light distribution pattern being at an angle between 30.degree. and 70.degree. to said ceiling; and
- a third flush-mounted light fixture for producing monosymmetrical light distribution recessed in said ceiling, spaced in close proximity apart from said corner formed by said first and second walls, said spacing being 0.3 to 0.5 of the distance from said ceiling to the elevation below at which the optimum illumination is desired, and having a main light distribution pattern directed downward from said fixture toward said corner, said light distribution pattern being at an angle between 30.degree. and 70.degree. to said ceiling,
- the impinging and reflected light to and from said first and second walls producing an average contrast rendition factor in the work task area of the room in excess of that produced by a substantially identical peripheral lighting arrangment of light fixtures producing axially symmetrical light distribution.
- 3. The method of quasi-indirectly illuminating a room having a ceiling and an adjacent and abutting vertical light-reflective wall, which comprises directing a plurality of flush-mounted light fixtures for producing monosymmetrical light distribution recessed in said ceiling near the junction of said ceiling and said wall, spaced from 0.3 to 0.5 of the distance from said ceiling to the elevation below at which the optimum illumination is desired, said elevation below said ceiling at which the optimum illumination is desired being located in the lower vertical one-half of the room, so that their main light distribution patterns are directed downward from said fixtures toward said wall, said light distribution pattern being at an angle between 30.degree. and 70.degree. to said ceiling, the impinging and reflected light to and from said wall producing an average contrast rendition factor in excess of that produced by a substantially identical lighting arrangement of light fixtures producing axially symmetrical light distribution.
- 4. In combination with a room ceiling and an adjoining vertical light reflective wall, a light system for quasi-indirectly illuminating such room, comprising one or more flush-mounted light fixtures for producing monosymmetrical light distribution recessed in said ceiling, each of said light fixtures comprising:
- an arcuate reflector segment;
- a substantially flat planar reflector segment, the upper edge of which is adjacent the upper edge of said arcuate reflector segment;
- connector means for actuating one or more light sources;
- means for enhancing a main light distribution pattern from said fixture; a prismatic lens; and
- a housing supporting said reflector segments, said pattern enhancing means, said connector means, and said prismatic lens.
- 5. The light system described in claim 4, wherein said pattern enhancing means includes a plurality of substantially parallel louvers disposed between said reflectors.
- 6. The light system described in claim 5, wherein said louvers are translucent plastic.
- 7. The light system described in claim 5, wherein said louvers are opaque metal.
- 8. The light system of claim 5, wherein said louvers are supported at such an angle, and are of sufficient length, that light is prevented from passing directly downward toward the work task area in the room.
- 9. The light system described in claim 5, wherein said louvers are supported at an angle between 40.degree. and 60.degree. to the ceiling surface.
- 10. The light system described in claim 4, wherein said arcuate planar reflector is supported such that the axis of said reflector is at an angle between 40.degree. and 60.degree. to said ceiling.
- 11. The light system described in claim 4, wherein said prismatic lens, in combination with said reflectors, results in a main light distribution pattern directed at an anlge between 40.degree. and 60.degree. to said ceiling.
- 12. The light system described in claim 4, wherein said substantially flat planar reflector is supported at an angle between 40.degree. and 60.degree. to the ceiling surface.
- 13. The light system described in claim 4, wherein said housing also supports side reflector pieces.
- 14. The light system described in claim 4, wherein said reflectors are coated with mirror like surfaces.
RELATED APPLICATION
This application is a continuation-in-part of a co-pending patent application by the same inventor, Ser. No. 376,320, filed July 5, 1973 now abandoned.
US Referenced Citations (4)
Non-Patent Literature Citations (1)
Entry |
"Studies of Illumination & Brightness," Illumination Engineering, Jan. 1947, pp. 96-97. |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
376320 |
Jul 1973 |
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