On the Validity of Daylight Factor for Evaluating the Energy Performance of Building
The Daylight factor is internationally recognized as the synthetic parameter to relate indoor visual task lighting requirements and daylight availability. Nevertheless, problems related within its static nature and the absence of connection with environmental parameters and geographic location, have been repeatedly highlighted in the literature. From an energy point of view, it is used in the European standard EN 15193:2008 for evaluating daylight penetration in buildings.