Patent ID: 8791642

Claim:
A semiconductor light emitting device, comprising: a first string of first light emitting diodes (“LED”) that emit unsaturated light having a color point that is within at least eight MacAdam ellipses from one or more points within a first region on the 1931 CIE Chromaticity Diagram defined by x, y chromaticity coordinates (0.32, 0.40), (0.36, 0.48), (0.43, 0.45), (0.42, 0.42), (0.36, 0.38), (0.32, 0.40); a second string of second LEDs that emit unsaturated light having color point that is within at least eight MacAdam ellipses from one or more points within a second region on the 1931 CIE Chromaticity Diagram defined by x, y chromaticity coordinates (0.35, 0.48), (0.26, 0.50), (0.13, 0.26), (0.15, 0.20), (0.26, 0.28), (0.35, 0.48); a third light source that emits radiation having a dominant wavelength between 600 and 720 nm; and a drive circuit that is configured to provide a first drive current to the first string of LEDs, a second drive current to the second string of LEDs and a third drive current to the third light source, wherein at least two of the first, second and third drive currents are configured to be independently controlled.