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Not only illuminance but also color of light, color of interior surfaces and luminance distribution contribute to the visual environment which affects our mood as well as perception of brightness. In order to identify the effects of light color, surface color and luminance distribution on perceptions of brightness and atmosphere in living rooms, a subjective experiment using a scale model was carried out. The relationship between Bright–Dark sensation and NB value showed that average NB value in the space could not predict Bright–Dark sensation. A further study on the effects of the color of light and the color of the wall on Bright–Dark sensation is necessary. The CCT of the lamps had effects on “Natural–Unnatural”, “Relaxing–Tense”, “Comfortable–Uncomfortable” as well as “Warm–Cool”. The 5200 K lamp gave a more comfortable and relaxing effects to the subjects than the 2800 K lamp.

Effects of Light Color, Surface Color and Luminance Distribution on Perception of Brightness and Atmosphere in Living Rooms