EFFECTS OF CHROMATICITY DIFFERENCE FROM PLANCKIAN LOCUS d_uv OF LIGHTING ON TINTED COLOUR OF ILLUMINATION AND BRIGHTNESS IN SPACE (PART 1): EXPERIMENT USING A SCALE MODEL WITH UNIFORM LUMINANCE DISTRIBUTION

Abstract

The purpose of this study is to identify the combined effects of illuminance, correlated colour temperature and chromaticity shift from the Planckian locus d_uv on the perception of the tinted colour of illumination and the spatial brightness. All 60 conditions with 3 levels of the floor illuminance, 4 conditions of the correlated colour temperature and 5 levels of d_uv were experimented. It was identified that the effects of the d_uv shift on tinted colour of illumination were different depending on the correlated colour temperature. It was identified that spatial brightness was significantly lower in the case with the positive d_uv.