In Brief:
According to the Mayo Clinic, seasonal affective disorder (SAD) is a condition that attacks its sufferers at the same time every year, usually during late autumn and early winter. According to Columbia University, more than 15 research centers have found positive treatment of winter-induced SAD with the use of light therapy.. According to Columbia University experts, some seasonal affective disorder sufferers respond better to light exposure in the morning instead of at night. According to Columbia University, the average photo-therapy light box consists of a set of fluorescent light bulbs. A Columbia University study of 100 seasonal affective disorder patients showed improvement with the use of a 10,000 lux system for 30 minutes per day..
