A device which is a white light emitting device comprising: a light emitting element having a peak wavelength in the range of 430-460 nm; and formed above the light emitting element, a fluorescent layer containing (i) a red fluorescent material having a composition of the formula: A a (M 1- s,Mn s)F b wherein A is K and Cs, M is at least one element selected from Si and Ti, and a, b, and s are numerical values satisfying 1.7 ≤ a ≤ 2.1, 5.3 ≤ b ≤ 6.3, and 0 < s ≤ 0.05; and which RFM has - a peak wavelength (λp) of 625-635 nm, - an effective wavelength width of a spectrum for light emitted from the fluorescent material of 15-45 nm, and - an external quantum efficiency (η) of 40-75%; and (ii) a green-yellow fluorescent material (GYFM) having a composition of the formula: (Y 1- u-v, Gd u,Ce v) c (Al 1- w, Ga w) 5 O d wherein c, d, u, v, and w are numerical values satisfying 2.8 ≤ c ≤ 3.2, 11.5 ≤ d ≤ 12.5, 0 ≤ u ≤ 0.2, 0.02 ≤ v ≤ 0.15, 0 ≤ w ≤ 0.3; and which GYFM has - a peak wavelength (λp) of 545-565 nm, - a full width at half maximum of light emitted from the fluorescent material (FWHM) of 90-110 nm, and - an external quantum efficiency (η) of 75-90 %. a light emitting element having a peak wavelength in the range of 430-460 nm; and formed above the light emitting element, a fluorescent layer containing (i) a red fluorescent material having a composition of the formula: A a (M 1- s,Mn s)F b wherein A is K and Cs, M is at least one element selected from Si and Ti, and a, b, and s are numerical values satisfying 1.7 ≤ a ≤ 2.1, 5.3 ≤ b ≤ 6.3, and 0 < s ≤ 0.05; and which RFM has - a peak wavelength (λp) of 625-635 nm, - an effective wavelength width of a spectrum for light emitted from the fluorescent material of 15-45 nm, and - an external quantum efficiency (η) of 40-75%; and (ii) a green-yellow fluorescent material (GYFM) having a composition of the formula: (Y 1- u-v, Gd u,Ce v) c (Al 1- w, Ga w) 5 O d wherein c, d, u, v, and w are numerical values satisfying 2.8 ≤ c ≤ 3.2, 11.5 ≤ d ≤ 12.5, 0 ≤ u ≤ 0.2, 0.02 ≤ v ≤ 0.15, 0 ≤ w ≤ 0.3; and which GYFM has - a peak wavelength (λp) of 545-565 nm, - a full width at half maximum of light emitted from the fluorescent material (FWHM) of 90-110 nm, and - an external quantum efficiency (η) of 75-90 %. (i) a red fluorescent material having a composition of the formula: A a (M 1- s,Mn s)F b wherein A is K and Cs, M is at least one element selected from Si and Ti, and a, b, and s are numerical values satisfying 1.7 ≤ a ≤ 2.1, 5.3 ≤ b ≤ 6.3, and 0 < s ≤ 0.05; and which RFM has - a peak wavelength (λp) of 625-635 nm, - an effective wavelength width of a spectrum for light emitted from the fluorescent material of 15-45 nm, and - an external quantum efficiency (η) of 40-75%; and - a peak wavelength (λp) of 625-635 nm, - an effective wavelength width of a spectrum for light emitted from the fluorescent material of 15-45 nm, and - an external quantum efficiency (η) of 40-75%; and (ii) a green-yellow fluorescent material (GYFM) having a composition of the formula: (Y 1- u-v, Gd u,Ce v) c (Al 1- w, Ga w) 5 O d wherein c, d, u, v, and w are numerical values satisfying 2.8 ≤ c ≤ 3.2, 11.5 ≤ d ≤ 12.5, 0 ≤ u ≤ 0.2, 0.02 ≤ v ≤ 0.15, 0 ≤ w ≤ 0.3; and which GYFM has - a peak wavelength (λp) of 545-565 nm, - a full width at half maximum of light emitted from the fluorescent material (FWHM) of 90-110 nm, and - an external quantum efficiency (η) of 75-90 %. - a peak wavelength (λp) of 545-565 nm, - a full width at half maximum of light emitted from the fluorescent material (FWHM) of 90-110 nm, and - an external quantum efficiency (η) of 75-90 %.