Daylight has a direct effect on occupant health and well-being. It is also an important parameter of the building's energy performance. The use of natural daylight can reduce energy consumption for artificial lighting and subsequent cooling loads. Furthermore, too much daylight is associated with overheating, glare and lack of privacy.

SRE undertakes detailed daylight calculations, both point-in-time and climate-based, in order to optimise building design, minimise CO2 emissions and maximise occupant comfort, health and wellbeing.

SRE also undertakes daylight calculations and reports in support of the Hea 01 credits for BREEAM.