| 简介 |
A light emitting device includes 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 the 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), 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 has an S/P ratio of 6.5 or less derived from the formula (1), which is the ratio of a luminous flux in scotopic vision relative to a luminous flux in photopic vision : (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. |
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