The objective of the Working Group is to make available a robust and comprehensive set of guidelines for safe and sustainable indoor lighting practices that promote human health and well-being. To disseminate the guidelines to a broad audience, including policymakers, lighting professionals and the general public. The aim of this action is to increase awareness of and accelerate initiatives for indoor lighting that support health and well-being.

The discovery of a third photo-receptor in the eye (photoreceptive retinal ganglion cells), in addition to rods and cones, has recently led to the realisation that human biological rhythms, cognitive performance and sleep quality are influenced by light conditions. It is now understood that light has pronounced beneficial effects – both physiological and psychologica