Light therapy Guide, Meaning , Facts, Information and Description
Light therapy or phototherapy consists of being exposed to very bright light for a prescribed amount of time. It has proven effective in treating seasonal affective disorder, and for some people it has ameliorated delayed sleep phase syndrome.Full sunlight is, of course, ideal. But there are a number of products (such as light boxes) using very intense artificial illumination that are effective as well. These products must provide 10,000 lux or more at the user's eyes, while filtering out any harmful ultraviolet radiation.
When treating delayed sleep phase, the timing of the exposure is critical. The light must be provided as soon after arising as possible to achieve any effect. Some users have reported success with lights that turn on shortly before waking.
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