Daylight white light with a color temperature of over 5,300 Kelvin wakes you up and activates you. In addition to fluorescent lamps, white LEDs with color temperatures between 6,000 and 8,000 Kelvin are particularly suitable. Lamps with little blue light, i.e. a color temperature of 2,700 Kelvin or less, create an atmosphere like at sunset and therefore have a calming effect on your own biorhythm...
…Natural daylight catches the eye from above and from the front. This means that artificial lighting is also based on this. The bright areas should therefore be up to an angle of 45 degrees from the line of sight. In addition, the biological effect of light increases with the intensity of the visible luminance of the light source. We recommend luminous ceilings or lights that emit part of the light indirectly against the ceiling and the upper third of the walls.
Click here for the full article by the FFEI (Fachverband der Elektro- und Elektronikindustrie):
Light and its effect - FEEI - Association of the Electrical and Electronics Industry
