Activity, concentration and cheerfulness.

The day/night cycle caused by the Earth's rotation is an important factor in the regulation of biological processes in the human body. The more precisely our internal clock is in synchronism with this day/night cycle the more capable we are of working well during the day and sleeping well at night – with a positive effect on our moods, well-being and general behavior.

More blue in the light.

It therefore makes sense from the medical point of view to simulate daylight with artificial lighting. At workplaces the addition of blue light with a wavelength around 460 nm can help because light with a high blue component has an activating effect on humans and boosts concentration.

Regular and coordinated.

The time factor also has a considerable influence on the effect of light.
This is because our internal clock has a "memory". For this reason, the influence of light
should not only be regular but should also be coordinated with other zeitgeber such as activity and food intake.

Prof. Dr. Jürgen Staedt, Medical Director at the Klinik für Psychiatrie, Psychotherapie und Psychosomatik – Memory Clinic Vivantes-Klinikum Berlin-Spandau:

"A daily dose of bright light with a sufficiently high blue component is extremely advisable, particularly in the dark winter months, for stabilizing our day/night cycle and therefore for our general well-being. In general medicine we are now using light more and more to achieve improvements in the general moods of our patients.”