The sky types in DIALux correspond to the CIE 110-1994 "Spatial Distribution of Daylight - Luminance Distributions of Various Reference Skies". Thereby a luminance is assigned to every point of the sky. The luminance depends on the solar height, the solar azimuth, the sky point height and the sky point azimuth.
Tab. 1 Sky types according to CIE 110-1994
Overcast Sky
Averaged Sky
Clear Sky
CIE-Name
Overcast Sky
Averaged Intermediate Sky
Developed by Nakamura, Oki et al.
Clear Sky
Description
Complete Overcast Sky, rotationally symmetrical luminance distribution
Developed from a long period of measurements, described average weather conditions
