Journal of the Korean Institute of Illuminating and Electrical Installation Engineers (조명전기설비학회논문지)

The Korean Institute of IIIuminating and Electrical Installation Engineers (한국조명전기설비학회)
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Aging-Time Dependence of Color Rendering Index of a LED Lamp for Lighting

조명용 LED 램프의 사용 시간에 따른 연색지수 특성변화

  • 손민우 (한국산업기술대학교 나노 광 공학과) ;
  • 이덕희 (한국산업기술대학교. 한밭대학교) ;
  • 서정철 (한국산업기술대학교 나노 광 공학과)
  • Received : 2013.11.06
  • Accepted : 2014.01.27
  • Published : 2014.03.31
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Abstract

We measured color rendering index(CRI) of a LED lamp for lighting for aging-time. We chose bulb type white LED lamp six samples and halogen lamp one sample and applied 220V, 60Hz to all the samples for 1,000hours at ordinary temperature. The CRI was measured every 20hours and the CRI change of the LED lamp was compared with the halogen lamp's CRI change. As time goes, efficiency of the halogen lamp decreased and the CRI maintained uniformly. The other hand, efficiency of the LED lamp decreased but the CRI increased. The CRI of the LED lamp has been stabilized since 600hours. The CRI change of the LED lamp was analyzed with a spectrum, color coordinate and color temperature.

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References

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