Daylighting is one of the basic components of passive solar building design and its estimation is essential. In India … there are a few available data of measured illuminance as in many regions of the world. The Indian climate is generally … daylighting in buildings. Therefore, an analytical model that would encompass the weather conditions of Indore was selected …

limited available data of measured illuminance which is the case of several regions in the tropics. Using established models … it is possible to predict the luminous efficacy and then estimate the monthly mean hourly exterior illuminance. In this … prediction of hourly exterior horizontal illuminance for the city of Kota Kinabalu in East Malaysia. Comparison between the two …