Light and health

This article is the continuation of the article “Light and health”, published in the Journal in 2018, №1. It deals with the influence of light on the hormones serotonin and melatonin. On the one hand, the importance of daylighting on serotonin production and our research work and results concerning this topic will be presented in this article. For the synchronisation of the inner clock daylight is essential. Our indoor society works and lives in spaces with a lack of natural daylight. The indoor (standard) illuminances may be enough for certain visual tasks but for the synchronisation of the circadian rhythm higher illuminances are needed. This can be achieved by light guiding systems as illustrated by application examples in this article. Light guiding lamella harvest the light and guide it to the reflective ceiling and therefore to the depth of the room. A conventional glazed façade is “repaired” by this light guiding systems. The more appropriate measure to improve daylight quality in buildings is another one: Daylight should be the decisive design parameter in the architectural designing process - new building typologies should be created...