Patent ID: 7961762

Claim:
A white light-emitting lamp, comprising: a semiconductor light-emitting element which emits light having a peak wavelength in a range of 370 nm to 470 nm; and a light-emitting portion, which is excited by the light emitted from the semiconductor light-emitting element to emit white light, containing a blue phosphor which absorbs the light to emit light having a peak wavelength in a range of 440 nm to 470 nm, a yellow phosphor which absorbs the light to emit light having a peak wavelength in a range of 535 nm to 570 nm and a red phosphor which absorbs the light to emit light having a peak wavelength in a range of 590 nm to 630 nm, wherein the yellow phosphor is composed of a europium and manganese-activated alkaline earth magnesium silicate phosphor having a composition expressed by a general formula: (Sr 1-x-y-z-u , Ba x , Mg y , Eu Z , Mn u ) 2 SiO 4 where, x, y, z and u are numerals satisfying 0.1≦x≦0.35, 0.025≦y≦0.105, 0.025≦z≦0.25, 0.0005≦u≦0.02.