The human being recognizes in the sky an element of vital importance, a global ancestral language that binds man to the outdoor environment.
Light is, in this sense, the key element to maintain a good psycho-physical balance during our days.
The outdoor stimuli such as light or dark helps us to regulate the biological clocks and keep us synchronized with the alternation day / night. Almost all the functions of the human body vary according to these rhythms, known as circadian cycles. The clocks that rules the circadian rhythms are controlled by the brain, are regulated by the sun through the visual system and deeply conditioning our health and well-being.
Today our rhythms have been suddenly reversed, during this new everyday routine passed within our homes walls is important to maintain a good quality of sleep, which influence all our mind functions: mood, concentration, attention, stress, etc. .The natural light is closely related to the production of melatonin which have a great influence on our wellbeing.