DAVITA® SAD Light Box PhysioLight LD 440 for simultaneous treatment of up to 2 patients for the professional treatment of SAD, Premenstrual Syndrom (PMS) and Sleep Disorders. The powerful SAD Light Box PhysioLight LD 440 with an extremely high lighting power of up to 60.000 Lux and 10.000 Lux at a distance of 65 cm it is designed for rational and simultaneous treatment of up to two patients in the clinic or in the doctor's surgery.