SOLID STATE LIGHTING DEVICES INCLUDING LIGHT MIXTURES

摘要

A solid state lighting apparatus includes a plurality of light emitting diodes (LEDs) including at least a first LED and a second LED. Chromaticities of the first and second LEDs are selected so that a combined light generated by a mixture of light from the pair of LEDs has about a target chromaticity. The first LED may include a first LED chip (43) that emits light in the blue portion of the visible spectrum and a phosphor (44) that emits red light in response to blue light emitted by the first LED chip. The second LED emits light having a color point that is above the planckian locus (106) of a 1931 CIE Chromaticity diagram, and in particular may have a yellow green, greenish yellow or green hue.