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Abstract Abstract: The development and popularization of LED technology has greatly satisfied people’s pursuit of visual effects, but the attendant large amount of light radiation has also caused people’s concern about the safety of light biology. At present, most of the known white LED production methods are using blue LED chips to stimulate yellow phosphors, and finally mixed into white light, resulting in rich blue components. At present, the harm of blue light radiation is one of the most important light radiation hazards to human beings. In this paper, the principle of blue light hazard, hazard evaluation mechanism, and the impact of blue light hazard on human beings are reviewed to reveal the severity of blue light hazard and provide theoretical basis and practical guidance for preventing blue light hazard.
Key words: blue light hazard; blue light measurement; photobiosafety; light radiation hazard; LED technology
（Acta Laser Biology Sinica, 2022, 31(5): 385-390）
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