Patent ID: 8044419

Claim:
A composition, comprising: a white phosphorous composition including: a first phosphor compound (P1) that emits radiation in a specific color of the visible spectrum, and a second phosphor compound (P2) that emits radiation in a color of the visible spectrum that is complementary to the color emitted by P1, wherein the combined emission of P1 and P2 is substantially white light, wherein both P1 and P2 have a characteristic that they each are excited by incident radiation in the same range of wavelengths, wherein a ratio of P1:P2 is determined from ε P1 /ε P2 =m P2 /m P1 , wherein ε P1 denotes an efficiency of conversion of incident radiation into emitted radiation of a certain color by the precursor phosphor P1, ε P2 denotes an efficiency of conversion of incident radiation into emitted radiation of a certain color by the precursor phosphor P2, and m P1 and m P2 denote, respectively, the mass of P1 and P2 in the white phosphor.