Patent ID: 7332106

Claim:
A light-emitting device having a first illuminant which emits a light having a wavelength of 420 to 500 nm and a second illuminant which emits a visible light when irradiated with the light from the first illuminate, wherein the second illuminate contains a phosphor, wherein the phosphor contains a crystal phase having a chemical composition of the following formula [1], and the object color of the phosphor satisfies L*≧90, −22≦a*≦−10, and b*≧55, in the L8, a*,b* color system: (Ln 1−a−b Ce a Tb b ) 3 M 5 O 12 Formula [1] wherein Ln is at least one element selected from the group consisting of Y,Gd,Sc,Lu and La, M is at least one element elected from the group consisting of Al, Ga and In and a and b are numbers which satisfy 0.00≦a≦0.3 and 0≦b≦0.5, respectively.