| Keywords |
Visual Response ; Color Temperature ; Fluorescent Lamp |
| Abstract |
This study examines the influence of correlated color temperature (CCT) of lamps on visual responses in a small office space. Field measurements and survey were performed in a full-scale mock-up model. Fluorescent lamps with 3500 K and 5000 K color temperature were applied to a recessed direct lighting system. Desktop illuminance levels were 500 lx and 850 lx which satisfy required illuminance for office activities. Eleven subjects participated in the survey. Result indicated that the sensation for brightness was more important than color temperature to feel the distribution of light in space. Under equal illuminance level higher color temperature caused brighter sensation. When 500 lx was used for target illuminance 5000 K color temperature was more effective for office activities, although the sensation for visual comfort was impaired slightly. When 3000 K color temperature was used higher illuminance than 500 lx would be useful to improve visual comfort. Temporary mood was not significantly influenced by color temperature from light in office space. Multiple linear regression implied that visual comfort was significantly influenced by color, brightness and visual stimulation under direct lighting conditions. |