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  2. Dawn simulation - Wikipedia

    en.wikipedia.org/wiki/Dawn_simulation

    Dawn simulation generally uses light sources that range in illuminance from 100 to 300 lux, while bright light boxes are usually in the 10,000-lux range. Approximately 19% [4] of patients discontinue post-awakening bright light therapy due to inconvenience. Because the entire treatment is complete before awakening, dawn simulation may be a more ...

  3. Light therapy - Wikipedia

    en.wikipedia.org/wiki/Light_therapy

    Light therapy, also called phototherapy or bright light therapy is the exposure to direct sunlight or artificial light at controlled wavelengths in order to treat a variety of medical disorders, including seasonal affective disorder (SAD), circadian rhythm sleep-wake disorders, cancers, and skin wound infections.

  4. Non-24-hour sleep–wake disorder - Wikipedia

    en.wikipedia.org/wiki/Non-24-hour_sleep–wake...

    Light therapy, which involves a bright light exposure of thousands of lux of white light or about 400 lux of blue light on awakening to counteract the tendency for circadian rhythms to delay (similar to treatment for delayed sleep phase disorder [6] and seasonal affective disorder), is not currently recommended until more studies appear ...

  5. Light effects on circadian rhythm - Wikipedia

    en.wikipedia.org/wiki/Light_effects_on_circadian...

    [6] [4] A shift in the circadian phase response curve creates a connection between the amount of light in a day (day length) and depressive symptoms in this disorder. [ 6 ] [ 4 ] Light seems to have therapeutic antidepressant effects when an organism is exposed to it at appropriate times during the circadian rhythm, regulating the sleep-wake cycle.

  6. Photoentrainment (chronobiology) - Wikipedia

    en.wikipedia.org/wiki/Photoentrainment_(chrono...

    Bipolar disorder is difficult to treat, so light therapy was looked at as a potential solution. One relevant study was a meta-analysis of light therapy trials for bipolar disorder. The findings overall were encouraging as well as non-conclusive. The findings indicate that light therapy can limit symptoms and improve clinical response. [25]

  7. Phase response curve - Wikipedia

    en.wikipedia.org/wiki/Phase_response_curve

    Immediately after this peak, light exposure has its greatest phase-advancing effect, causing earlier wake-up and sleep onset. Again, illuminance greatly affects results; indoor light may be less than 500 lux, while light therapy uses up to 10,000 lux. The effect diminishes until about two hours after spontaneous wake-up time, when it reaches ...

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