Light emitting device

A light emitting device, comprising

• a light emitting element having a dominant wavelength in a range of 400 nm or more and 500 nm or less, and
• a wavelength conversion member that is arranged on a light emitting side of the light emitting element and includes a rare earth aluminate fluorescent material having a composition represented by the following formula (I):
• (Lu1-p-nLnpCen)3(Al1-mGam)5kO12 (I)
• wherein in the formula (I), Ln represents at least one rare earth element selected from the group consisting of Y, La, Gd, and Tb, and the parameters k, m, n, and p satisfy 0.95≤k≤1.05, 0.05≤m≤0.70, 0.002≤n≤0.050, and 0≤p≤0.30 respectively,
• wherein the light emitting device emits light having a dominant wavelength in a range of 475 nm or more and 500 nm or less, and
• wherein the light emitting device emits light having a melanopic ratio of 3.4 or less derived from the following formula (2):
• Melanopic
• ⁢
• ⁢
• ratio
• =
• ∫
• 380
• 730
• ⁢
• Lamp
• ×
• Circadian
• ∫
• 380
• 730
• ⁢
• Lamp
• ×
• Visual
• ×
• 1.218
• (
• 2
• )
• wherein in the formula (2), in a range where the wavelength is 380 nm or more and 730 nm or less, “Lamp” refers to a spectral distribution of the light emitting device, “Circadian” refers to a sensitivity curve of an intrinsically photosensitive retinal ganglion cell that is a photoreceptor in the mammalian retina, “Visual” refers to a visual sensitivity curve in human photopic vision, “Lamp×Circadian” refers to a circadian response included in the spectral distribution of the light emitting device, “Lamp×Visual” refers to a visual sensitivity response included in the spectral distribution of the light emitting device, and “1.218” is a constant (lux factor).