A light source including a specific LED and phosphor combination capable of emitting
white light for direct illumination. In one embodiment, the light source includes
an LED chip emitting in the 460-470 nm range radiationally coupled to a phosphor
comprising Ca8Mg(SiO4)4Cl2:Eu2+,Mn2+.
In a second embodiment, the light source includes an LED chip emitting at about
430 nm and a phosphor comprising a blend of Sr4Al14O25:Eu2+
(SAE) and a second phosphor having the formula(Tb1-x-yAxREy)3DzO12,
where A is a member selected from the group consisting of Y, La, Gd, and Sm; RE
is a member selected from the group consisting of Ce, Pr, Nd, Sm, Eu, Gd, Dy, Ho,
Er, Tm, Yb, and Lu; D is a member selected from the group consisting of Al, Ga,
and In; x is in the range from 0 to about 0.5, y is in the range from about 0 to
about 0.2, and z is in the range from about 4 to about 5. Both embodiments produce
light having the coordinates x=0.240-0.260 and y=0.340-0.360 on the CIE chromaticity diagram.