Patent ID: 8558251

Claim:
A light emitting device comprising: a board; a plurality of first light emitting elements mounted on the board to emit light having a wavelength of 250 nm to 500 nm; a plurality of second light emitting elements mounted on the board to emit light having a wavelength of 250 nm to 500 nm; a first fluorescent layer formed on each of the first light emitting elements, the first fluorescent layer including a first phosphor; and a second fluorescent layer formed on each of the second light emitting elements, the second fluorescent layer including a second phosphor being higher than the first phosphor in luminous efficiency at 50° C., being lower than the first phosphor in the luminous efficiency at 150° C., wherein the first light emitting elements are mounted on a first region of the board, the second light emitting elements are mounted on a second region of the board, and the first region has higher rate of increase in temperature than that of the second region.