Relief begins in 3 to 4 days and is usually complete within 2 weeks. Response if frequently dramatic and patients who have suffered for years are profoundly relieved. Remission of symptoms continues as long as the light sessions are continued. Sessions can be discontinued when spring arrives with its longer day duration. Light units should be designed to meet researchers specifications and be calibrated so the patient knows at what distance to sit in order to receive the proper lux level.
Some insurance companies reimburse for the purchase of light boxes.
But light deprivation may also be due to insufficient light exposure from indoor working conditions, health and age-related indoor confinement, shift work schedules, or unseasonably cloudy weather. Light therapy is an exciting, fast growing field. In can be instrumental in helping people overcome jet lag and shift work schedule adjustments. Enviro-Med is a Washington based company providing consulting services, informational talks and research updates. It's owner, Sherrie Baxter, is a SAD sufferer and user of light therapy.