Natural daylight

natural daylight2

Daylight is more than light

The daylight we see might not be the daylight our body needs. When talking about daylight three items are important:

Our sense of vision used for visual information and providing us orientation;

The colour temperature  measured in Kelvin(K) influencing our psyche;

The full spectrum of daylight (from ultraviiolet to  nearly infrared) affecting  the human bioclock and immune system.

Learn more about the  time lapsing varying light levels, see  

Special glazing (solar control, solar-films or electrochromic) change the spectral composition of the natural daylight while solar shading systems can reduce the quantity of daylight entering a room without changing its nature. This is due to the fact that shading reduces the energy transmittance keeping a part of direct light transmittance (through holes or slats for example). 

IUse of daylight is of great importance as it can lead to a significant reduction of energy demand caused by artificial lighting. At the same time, access to daylight in a living and working space contributes significantly to the well-being and health preservation of occupants.

Extract of findings in BPIE report 2015 on Indoor air quality, thermal comfort and daylight

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