Redistributions of luminance patterns on standard sky types

Abstract

There is insufficient current knowledge on the sky luminance patterns under ISO/CIE standard sky types in absolute luminance physical units in cd.m−2 and the resulting horizontal skylight illuminance in lux at the ground level. This paper explains research results and formulae to enable determination of computer applications which help in any location and time to calculate the distribution of luminance in any sky element on outdoor surfaces or within window solid angles that cause interior illuminance perception problems and, or discomfort glare.