Downlight and downlight wall wash reflectors

Illumination – Light source and modifier – Including reflector

Patent

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Details

362297, 362346, 362347, 362364, 362148, F21V 700, F21S 102

Patent

active

058000500

ABSTRACT:
Downlight and downlight wall wash reflectors particularly useful with compact fluorescent lamps and other large-area light sources, the reflector optics of the invention maximize the efficiency of the luminaire while providing brightness control and avoidance of high angle glare or "flash". Downlight reflectors according to the invention provide a truly uniform illuminance distribution across the illuminated area when applied in a rectangular grid with maximum use of available light by providing an upper amplifying reflector section which reflects normally underutilized light to a lower distribution reflector section which radiates a large percentage of generated light effectively from the bottom of the light source, thus reducing the apparent size of the light source and increasing optical control. The lower reflector section reflects light only into zones where the light is needed and avoids high angle zones, most of the light being reflected into zones from 35.degree. to 45.degree. from vertical or nadir, thereby widening the distribution and also producing high efficiency and aesthetically pleasing performance. Wall wash reflectors according to the invention are provided with a specular lower zone formed by a specular finish at lower portions of the wall washing reflectors to yield high light levels on a vertical wall near the ceiling line while avoiding high angle glare or "flash" in the opposite direction.

REFERENCES:
patent: 1387424 (1921-08-01), Merritt
patent: 3370165 (1968-02-01), Chan
patent: 4039822 (1977-08-01), Chan et al.
patent: 4475147 (1984-10-01), Kristofek
patent: 4562517 (1985-12-01), Pankin
patent: 4742440 (1988-05-01), Guzzini
patent: 5363295 (1994-11-01), DeKleine et al.
patent: 5398179 (1995-03-01), Pacheco
patent: 5440471 (1995-08-01), Zadeh
patent: 5535110 (1996-07-01), Ling
QUICKLITE, The Fast Permanent Retrofit Ceiling Fixture for Recessed Downlights, Lighten Up Products, see entire document. Apr. 1995.

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