Artificial light sources are the replacement of sunlight. The pursuit of luminous efficiency has always been the mainstream of the development of artificial light source technology. The proportion of spectral components and sunlight often have a large difference, which has a positive and negative impact on human health. In recent years, semiconductor lighting has been widely used due to energy saving and environmental protection. However, at present, LED white light sources are mostly mixed white light of yellow phosphor excited by blue light, and there is a possibility of "blue light hazard".
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