The turbid emotional seasonal workers (HEAP), more commonly named the seasonal depression or “SAD” of the anglophone abbreviation of seasonal emotional disorder , refer to a form Dépression related to a lack of natural luminosity. The depression begins with the change from Saison, when the hours of sunnings decrease, to grow blurred that when the season is finished.

Cures of Luminothérapie are used to fill the natural lack of light. The exposure to the little lasting sun of time and a small surface such as the face suffices for to synthesize the Vitamine D in sufficient quantity and to make disappear the appearance of HEAP. It is recommended to exclusively give a supplement of vitamin D to the nursed Bébé S and alive in Scandinavian country and where the Ensoleillement is weak.