Use of a white light emitting device in a dental lighting system, comprising: a light-emitting diode emitting first light having a light emission intensity peak at a wavelength region of from 350 to 490 nm; and a phosphor layer emitting second light in response to excitation by the light of the light-emitting diode, and white light by the second light or a combination of the first light and the second light being emitted from the phosphor layer, wherein the phosphor layer includes a plurality of phosphors each having a light emission intensity peak different from one another at a wavelength region of from 420 to 700 nm, the plurality of phosphors includes at least three phosphors selected from the group consisting of a blue phosphor, a blue-green phosphor, a green phosphor, an yellow phosphor, and a red phosphor, and the light emission spectrum of the light-emitting diode and the light emission spectra of the plurality of phosphors have at least one region where two or more of the light emission spectra are overlapped, a relative color temperature of the white light is 3600 K or more and less than 6400 K, an average color rendering index Ra of the white light is larger than 85, a ratio of a peak radiant flux at the wavelength region of from 430 to 480 nm of the white light relative to a radiant flux at a wavelength of 555 nm of the white light is 0.5 or more and 1.3 or less, and when an integral value of a radiant flux at a wavelength region of from 380 to 780 nm of the white light is set to be an integral value A, and an integral value of a radiant flux at a wavelength region of from 380 to 480 nm of the white light is set to be an integral value B, a ratio of the integral value B relative to the integral value A is 0.3 or less. a light-emitting diode emitting first light having a light emission intensity peak at a wavelength region of from 350 to 490 nm; and a phosphor layer emitting second light in response to excitation by the light of the light-emitting diode, and white light by the second light or a combination of the first light and the second light being emitted from the phosphor layer, wherein the phosphor layer includes a plurality of phosphors each having a light emission intensity peak different from one another at a wavelength region of from 420 to 700 nm, the plurality of phosphors includes at least three phosphors selected from the group consisting of a blue phosphor, a blue-green phosphor, a green phosphor, an yellow phosphor, and a red phosphor, and the light emission spectrum of the light-emitting diode and the light emission spectra of the plurality of phosphors have at least one region where two or more of the light emission spectra are overlapped, a relative color temperature of the white light is 3600 K or more and less than 6400 K, an average color rendering index Ra of the white light is larger than 85, a ratio of a peak radiant flux at the wavelength region of from 430 to 480 nm of the white light relative to a radiant flux at a wavelength of 555 nm of the white light is 0.5 or more and 1.3 or less, and when an integral value of a radiant flux at a wavelength region of from 380 to 780 nm of the white light is set to be an integral value A, and an integral value of a radiant flux at a wavelength region of from 380 to 480 nm of the white light is set to be an integral value B, a ratio of the integral value B relative to the integral value A is 0.3 or less.