Patent ID: 7959341

Claim:
An illumination system comprising: a plurality of illumination panels arranged in a planar arrangement, wherein each of the plurality of illumination panels is substantially adjacent to at least one other illumination panel of the plurality of illumination panels; a plurality of light sources configured to emit light so that each of the plurality of illumination panels are edge-lit by one or more of the plurality of light sources through at least one edge of each of the plurality of the illumination panels; a light sensor configured to detect the emitted light from the plurality of light sources and output at least one signal characteristic of the detected light; a power source configured to supply power to at least one light source of the plurality of light sources; and a control unit configured to receive the at least one signal from the light sensor, obtain a value characteristic of the light emitted by the at least one light source at least partially based on the at least one signal provided by the light sensor, and control the power source to modify the power supplied to the at least one light source at least partially based on the value characteristic of the light emitted by the at least one light source.