INFLUENCE OF INTERIOR REFLECTANCE AND CORRELATED COLOR TEMPERATURE ON THE PERCEIVED AND REQUIRED LEVELS OF SPATIAL BRIGHTNESS FOR VARIOUS ACTIVITIES

Abstract

Recently, several studies were conducted on spatial brightness for the perception of spatial brightness; however, in design, “the amount of spatial brightness required” is more important. In this study, five types of activities in a house were set, and the spatial brightness that felt “just good brightness” was investigated for each color temperature and interior reflectance. The spatial average luminance, which is considered to be just right, tends to decrease as the color temperature and interior reflectance increase.