| 摘要 |
The purpose of the present invention is to more accurately increase the average colour rendering index (Ra) during use. Provided is a light-emission device in which a plurality of types of LED elements are directly mounted to an LED mounting substrate. The plurality of types of LED elements include blue LED elements and red LED elements, and are configured such that, when Bn25 represents the light-emission intensity of the peak wavelength of the blue LED elements at room temperature (25˚C), Bn80 represents the light-emission intensity of the peak wavelength of the blue LED elements at usage temperature (80˚C), Rn25 represents the light-emission intensity of the peak wavelength of the red LED elements at room temperature (25˚C), and Rn80 represents the light-emission intensity of the peak wavelength of the red LED elements at usage temperature (80˚C), Rn25/Bn25<Rn80/Bn80, 3.0≤Rn25/Bn25, and 3.3≤Rn80/Bn80 are satisfied. |
