Patent ID: 8884514

Claim:
A composition, comprising: a mixture of a first phosphor, and a second phosphor that is different from the first phosphor; and a resin; wherein: each of the first phosphor and the second phosphor is independently selected from the group consisting of oxides, oxynitrides, and nitrides; each of the first phosphor and the second phosphor has a luminous efficiency of 35% or higher when excited by visible light from a semiconductor light emitting device at room temperature; the second phosphor is capable of absorbing emitted light from the first phosphor; the first phosphor is present in the mixture of phosphors in an amount of at least 85% by weight; the second phosphor has the following formula (3): M a A b D c E d X e (3) wherein: M is Eu and optionally at least one element selected from the group consisting of Mn, Ce, Pr, Nd, Sm, Tb, Dy, Ho, Er, Tm, and Yb; A is selected from the group consisting of bivalent metal elements other than M; D is at least one element selected from the group consisting of tetravalent metal elements; E is at least one element selected from the group consisting of trivalent metal elements; X is at least one element selected from the group consisting of 0, N, and F; and a, b, c, d, and e satisfy the following conditions: a+b= 1; 0.00001≦a≦0.1; 0.5≦c≦1.8; 0.5≦d≦1.8; 0.8×(⅔+4/3 ×c+d )≦ e ; and e≦ 1.2×(⅔+4/3 ×c+d ).