Patent ID: 8079729

Claim:
A lighting device comprising: a first group of solid state light emitters; a first luminescent material; and a second luminescent material, wherein: said first group of solid state light emitters, if illuminated, would emit light having a peak wavelength in the near ultraviolet range or in the ultraviolet range; said first luminescent material, if excited, would emit light having a dominant wavelength in the range of from about 480 nm to about 490 nm; said second luminescent material, if excited, would emit light having a dominant wavelength in the range of from about 580 nm to about 590 nm; and if said first group of solid state light emitters is illuminated, a mixture of (1) light emitted from said lighting device which was emitted by said first group of solid state light emitters, (2) light emitted from said lighting device which was emitted by said first luminescent material, and (3) light emitted from said lighting device which was emitted by said second luminescent material would, in the absence of any additional light, have a combined illumination having x, y coordinates on a 1931 CIE Chromaticity Diagram which define a point which is within twenty MacAdam ellipses of at least one point on the blackbody locus on a 1931 CIE Chromaticity Diagram.