Patent ID: 7135664

Claim:
A method for calibrating a lighting system for illuminating a space in response to a control command specifying an illumination color for the space, wherein the system has a plurality of light emission apparatus each having a plurality of light sources producing different colored light, said method comprising for each of the plurality of a light emission apparatus: defining a separate reference value for a characteristic of light produced by each light source wherein such defining comprises adjusting operation of the plurality of light sources until a combination of the light produced by the plurality of light sources has a predefined correlated color temperature, and sensing the characteristic of the light produced by each light source and thereby producing a reference value for each light source; sensing the characteristic of the light produced by each light source and thereby producing a sensed value for each light source; for each light source, comparing the respective sensed value to the respective reference value; and adjusting operation of each light source as necessary based on the comparing; thereby calibrating each of the plurality of light emission apparatus so that combined light from the plurality of light sources has the illumination color.