Light Therapy consists of exposure to specific ranges of light wavelengths. There are several types of treatments available. Low-level lasers penetrate deeply into the skin and work by restoring abnormal cellular function. Benefits include improved metabolism, circulation and tissue healing. Other treatment variations consist of very bright, full-spectrum light or "light boxes" that use very intense artificial illumination for a prescribed amount of time. Full sunlight or light boxes are preferred for seasonal affective disorder (SAD).
Other treatments are based upon infrared light exposure. Light therapy is useful for treating skin conditions such as psoriasis and skin rejuvenation.