Daylight Measurement Data required for Daylighting Calculation

Why should we collect daylight measurement data? One of the most important purpose of the collection is to use for daylighting calculation. The calculation can be classified to two, (A) for the research and (B) for the practical application. Since it is difficult to predict at present time what kind of research we do in future and to specify a class of measurement data for above research, we have to collect and store only basic or typical data of daylight source as uncooked materials. Therefore, only the data for practice are considered in this lecture. The following figures show flow charts of various practical daylighting calculations, which are introduced from “Daylighting Calculation Method” to be published by the Architectural Institute of Japan soon.