Daylight Calculation
Home Up Solar Radiation Sky Conditions for Daylighting Luminance Distribution in Overcast Sky Daylight Calculation Daylight Factor Methods for Daylight Factor Estimation Daylight Factor Contours Models of Artificial Sky Design Consideration


4. Daylight calculation

Daylight can be handled quantitatively in two ways:

(a) by using luminous quantities (flux, illuminance), i.e., by a set of outdoor conditions and calculating the resulting interior illumiances;

(b) by using relative values (the daylight factor) which compare indoor to outdoor illuminance. For a given position, this factor is constant under widely varying outdoor lighting conditions.