Daylight modelling is the prediction of various radiant or luminous quantities using daylight conditions derived from standard meteorological datasets.
Daylight modelling made its appearance among other building performance simulation disciplines relatively recently, marking a profound change from the previously established daylighting analyses, such as the daylight factor and sun path diagrams. Daylight metrics derived from daylight modelling now appear in building guidelines, and daylight modelling evaluations are becoming widespread in design practices since they have proven to be a powerful tool to extract a wealth of information on the daylighting annual performance of buildings.