Developed as an alternative to a flourescent light box for the treatment of Seasonal Affective Disorder, Aura Corporation offer the Actulite Polarised Daylight Lighting System. The light produced is almost identical to the light on a slightly overcast spring day, the company claims. When Actulite luminaires are installed in a domestic kitchen or study, there are designed to engender a 'feel good' factor. This means that SAD sufferers do not have to look into a light box for hours.