A phosphor composition and a light source constructed therefrom are
disclosed. The phosphor composition includes first and second phosphors.
The first phosphor includes first phosphor particles that convert light
of an excitation wavelength to light having a first spectrum
characterized by an intensity of light that varies as a function of
wavelength. The first phosphor particles are chosen such that the first
spectrum is independent of the size of the particles. The second phosphor
includes particles of a QD phosphor that convert the excitation light to
light in a QD phosphor spectrum. The first phosphor particles and the QD
phosphor particles are present in a ratio of concentrations. The ratio,
the first phosphor particles, and the QD phosphor particles are chosen
such that a combined spectrum has an intensity that is more uniform as a
function of wavelength than either the QD phosphor spectrum or the first
spectrum.