Behavioural determinants of physiologically-relevant light exposure

Light exposure triggers a range of physiological and behavioural responses that can improve and challenge health and well-being. Insights from laboratory studies have recently cumulated in standards and guidelines for measuring and assessing healthy light exposure, and recommendations for healthy criterion light levels. Implicit to laboratory paradigms is a simplistic input-output relationship between light and its effects on physiology. This ignores that humans actively shape their lighting environment through behaviour. We present a novel framework that conceptualizes light exposure as an individual behaviour to meet specific, person-based needs. Key to healthy light exposure is also shaping behaviour, beyond shaping technology.