Daylight provides the qualities and characteristics that serve as a basis for optimising artificial light.
The electromagnetic spectrum
Visible light is only a small section of electromagnetic radiation which produces a sensation of brightness and colour in the human eye. Electromagnetic radiation is a form of energy.
A distinction is made between spectrometry values and photometric values. Spectrometry values are purely technical values that do not relate to the effect of light on human beings. The values are derived from the watt.
