| Title |
Aging-Time Dependence of Color Rendering Index of a LED Lamp for Lighting |
| Authors |
Minwoo Son ; Duck Hee Lee ; Jung-Chul Seo |
| DOI |
http://dx.doi.org/10.5207/JIEIE.2014.28.3.001 |
| Keywords |
LED Lamp ; Color Rendering Index ; Change ; Aging-Time ; 1,000hours |
| 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. |