| Title |
A Study on the Evaluation and Comparison on Discomfort Glare of LED Lamp and Fluorescent Lamp |
| Authors |
Lee Jin-Sook ; Kim Won-Do ; Han Won-Tak |
| Keywords |
Discomfort Glare ; Luminous Source ; LED Lamp ; Fluorescent Lamp ; Color Temperature |
| Abstract |
The purposes of this study are to conduct comparison and analysis of discomfort glare of LED lamp that replace fluorescent lamp, to examine influence of diffuse plate on discomfort glare, and to secure data after comparing and analyzing influence of color temperature of lighting on discomfort glare. With these purposes, this study was conducted in four steps. 1) A full-size mock-up was built to install fluorescent lamp and replace it with LED lamp and various diffuse plates. 2) Physical features were measured based on different experimental variables, and discomfort glare of fluorescent and LED lamps were compared and analyzed. 3) Difference of discomfort glare due to transmittance of diffuse plate attached to the lower part of a luminaire was compared and analyzed both for fluorescent and LED. 4) An experiment to examine discomfort glare based on different color temperature of fluorescent and LED lamps was conducted and the result data was compared and analyzed. The result of the experiments showed that LED lamps had a worse discomfort glare than fluorescent lamp under the same luminance, and difference between the two light sources became large as luminance got higher. When the transmittance of diffuse plate was 58%, discomfort glare of fluorescent and LED lamps changed in the same way. When the transmittance of diffuse plate was 71%, discomfort glare of LED lamps increased more than fluorescent lamp according to increase in luminance. When the transmittance of diffuse plate was 83%, discomfort glare of fluorescent lightings became higher under the lower luminance and that of LED lamp became higher under the higher luminance. When diffuse plate was not installed, discomfort glare of LED lsmps was higher in general under the same luminance. When color temperature was less than 5000K, discomfort glare of LED lamps was higher than fluorescent lamp under the same luminance and color temperature. When color temperature was more than 6000K, discomfort glare of fluorescent lightings was higher than LED lamps. |