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Evaluation of Blue Light Hazards in LED Lightings
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 Title & Authors
Evaluation of Blue Light Hazards in LED Lightings
Jung, Myoung Hoon; Yang, Seok-Jun; Yuk, Ju Sung; Oh, Sang-Young; Kim, Chang-Jin; Lyu, Jungmook; Choi, Eun Jung;
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Purpose: To evaluate blue light hazards of LED lightings in an optical store with blue light radiance used as the quantitative indicators of photobiological hazard. Methods: The spectral radiance of each LED lightings was measured, and blue-light radiance and the corresponding maximum exposure time were calculated. Then each LED lighting was classified according to the risk group from IEC 62471 standard. Results: The yellow LED lightings used in showcases and white LED lightings used on ceilings and logo were classified into risk group RG0. But the white LED lightings used on showcases were classified into risk group RG1. The blue light radiances of white LED lightings used in showcases are dozens of times larger than that of fluorescent lamp. Conclusions: Using the value of the blue light radiance could quantitatively express the blue light hazard to various lightings. It was confirmed that white LED lightings for the showcases had high blue light hazards because of their high luminance and color temperature. Therefore, when replacing lightings in optical shop it is necessary to select the appropriate brightness and color temperature for eye health in the long term.
LED lighting;IEC 62471;Blue light hazard;Blue light radiance;Radiance;CCT;Blue light hazard function;
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LED 청색광 분석을 통한 청색광 차단렌즈의 성능 최적화,손영현;양석준;김창진;이경선;최수미;유영국;오상영;정미선;조아라;최은정;

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