Patent ID: 7916296

Claim:
Method of adjusting a color point of a lamp comprising a plurality of N different light sources emitting light at different wavelengths, the method comprising the steps of: (i) defining a target color point, (ii) operating the plurality of light sources within the lamp, wherein N≧3, and (iii) adjusting the contributions of M out of the N light sources to the overall light to be emitted by the lamp so as to meet said target color point, wherein the adjusting step comprises: calculating ( N M ) permutations of combinations of light sources, calculating for at least two of the calculated permutations, the contributions of the light sources to the overall light emitted by the lamp to meet said target color point, adding up the calculated contributions of each light source from at least two of the calculated permutations into an overall contribution of each light source separately, and operating the lamp with the resulting overall contributions of all light sources.