Effects of chromaticity difference from Planckian locus duv of lighting on tinted color of illumination and brightness in space (part 1): Experiment using a scale model with uniform luminance distribution

Abstract The purpose of this study was to identify the combined effects of illuminance, correlated color temperature, and chromaticity shift from the Planckian locus d uv on the perception of the tinted color of illumination and spatial brightness. All 60 conditions with 3 levels of floor illuminance, 4 conditions of correlated color temperature, and 5 levels of d uv were tested. Consequently, it was identified that the effects of the d uv shift on the tinted color of illumination differed depending on the correlated color temperature. The spatial brightness was significantly lower in the case of positive d uv .