Why Daylight It is a healthy and freely available source of light, which is essential in the human diurnal cycle. But quality is location dependent and seasonally affected. Previously, limited access to daylight meant handling projects by electric lighting and deep floor plates to overcome issues like heat gain and glare. Today, we know that daylight analysis and design are crucial in order to improve the energy use and whole-life cost of any buildings. Healthy Spaces - Humans now spend close to 95% of time indoors. Quantity and quality of light, colour spectrum, view to outside, connection to nature etc. all influence the health and productivity of the users. Themes like perception, psychological impact, emotional experiences along with the nonvisual effects of light play an important role in how we design our buildings. New standards like WELL focus on qualitative aspects of day/light and in the future it will be the developers and construction professionals offering better, healthier living and working environments who will profit most. 4
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