White phosphors, methods of making white phosphors, white light emitting LEDs, methods of making white light emitting LEDs, and light bulb structures

A method of making a phosphor composition, comprising:

• providing a first phosphor compound (P1) that emits radiation in a specific color of the visible spectrum;
• providing 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 both P1 and P2 have a characteristic that they each are excited by incident radiation in the same range of wavelengths;
• and
• mixing the first phosphor with the second phosphor, wherein the mixing is performed by intimately combining P1 and P2 physically or chemically,
• wherein a ratio of P1:P2 is determined from εP1/εP2=mP2/mP1 such that the phosphor composition emits a white light wherein one of mP2 or mP1 is 1, wherein εP1 denotes an efficiency of conversion of incident radiation into emitted radiation of the specific color by P1, εP2 denotes an efficiency of conversion of incident radiation into emitted radiation of the color by P2, and mP1 and mP2 denote, respectively, the mass of P1 and P2 in the phosphor composition.