Patent ID: 7573209

Claim:
A system for feedback and control of a luminaire including two or more light-emitting elements in two or more colors, each of the two or more light-emitting elements supplied with electrical current to produce light of a desired chromaticity and luminous flux under operating conditions, the system comprising: a) a feedback system including two or more light sensors for detecting the light and generating color signals, the feedback system generating current values representative of luminous flux and chromaticity of the light from the color signals, the feedback system further including two or more color filters associated with the two or more light sensors for providing the color signals; and b) a control system operatively integrated with the feedback system, said control system determining an adjustment factor through a correlation of the current values and a desired chromaticity and luminous flux, the control system adjusting the electrical current to one or more of the two or more light-emitting elements in accordance with the adjustment factor, the control system adjusting the electrical current without perceivable visual flicker or momentary chromaticity shifts.