Free-cavity, double-diffusing indirect lighting luminaire

Details Free-cavity, double-diffusing indirect lighting luminaire Free-cavity, double-diffusing indirect lighting luminaire

2007-10-23

2007-10-23

O'Shea, Sandra (Department: 2875)

Illumination

Light source and modifier

Including reflector

C362S308000, C362S328000, C362S147000, C362S408000

Reexamination Certificate

active

11378584

ABSTRACT:
A lighting system and device for providing indirect light using free-cavity, double-diffusing configurations are disclosed. In accordance with the embodiments of the invention, a lighting fixture comprises a cover structure with a diffusion layer and a reflective plate that form the free-cavity. The free-cavity is preferably configured to provide an output of light from a light source positioned within the free-cavity with an efficiency rating of 70% or more and provide better than an 8:1 ceiling lighting contrast between the rows of fixtures with rows on 16 feet spacing. Further, in accordance with a preferred embodiment of the invention, a device is configured to couple to a ceiling structure and provide the indirect lighting from a fluorescent light source.

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