Patent ID: 8878429
Filing Date: 2014-11-04
Classification: F21K,G09G,H05B

Abstract:
1. A lighting device comprising: a plurality of sources of visible light, said sources each selected from among solid state light emitters and luminescent materials, each source of visible light, when illuminated, emitting light of a hue, said sources of visible light, when illuminated, emitting in total three different hues, said sources of visible light comprising a first group of sources of visible light and a second group of sources of visible light, said first group of sources of visible light comprising sources of visible light which, when illuminated, emit light of two hues which, if mixed in the absence of any other light, produce a first group mixed illumination which would have x,y color coordinates which are within an area on a 1931 CIE Chromaticity Diagram defined by five points having x,y coordinates: 0.59, 0.24; 0.40, 0.50; 0.24, 0.53; 0.17, 0.25; and 0.30, 0.12, said second group of sources of visible light comprising at least one source of visible light of a first additional hue, wherein mixing of light from said first group of sources of visible light and light from said second group of sources of visible light produces a first group-second group mixed illumination of a hue which is within ten MacAdam ellipses of at least one point on a blackbody locus on said 1931 CIE Chromaticity Diagram.