Patent ID: 7990045

Claim:
A lighting source, having a predetermined correlated color temperature, comprising: a light emitter comprising a blue electroluminescent light-emitting diode, having a peak wavelength, generating a flux that is partially absorbed and converted to other wavelengths by a set of phosphors, each phosphor having a primary color, peak wavelength, and bandwidth, and with the peak wavelengths and relative fluxes generated by the light-emitting diode and the set of phosphors being selected such that in comparison with a reference lighting source, when each of more than fourteen different test color samples resolved by an average human eye as different is illuminated: (a) chromaticity shifts with a chromatic adaptation of human vision taken into account are preserved within corresponding regions of a chromaticity diagram, each containing all colors that are indistinguishable, to the average human eye, from a color at a center of the region; and (b) lightness shifts are preserved within predetermined values.