scope:

This European Standard specifies minimum recommendations for achieving, by means of natural light, an adequate subjective impression of lightness indoors, and for providing an adequate view out. In addition, recommendations for the duration of sunshine exposure within habitable and occupied rooms are given. This standard gives information on how to use daylighting to provide lighting within interiors, and how to limit glare. This standard defines metrics used for the evaluation of daylighting conditions and gives methods of calculation and verification. This standard applies to all spaces that may be regularly occupied by people for extended periods except where daylighting is contrary to the nature and role of the actual work done. The specification of lighting requirements for humans in indoor work places including visual tasks are given in EN 12464-1 and are not part of this standard. The specification of calculation procedures and metrics related to the energy performance of buildings are given in EN 15193 and are not part of this standard.