Nature of Daylight
Sky types
Availability of daylight
Diffuse horizontal illuminance
Diffuse horizontal illuminance exceeding 10klx
Diffuse horizontal illuminance exceeding 20klx
Global horizontal illuminance
Global horizontal illuminance exceeding 30klx
Global horizontal illuminance exceeding 40klx
Probability of certain sky types
Frequency of overcast skies
Frequency of clear skies
The path of the sun
Simulating daylighting