With bright light therapy, SAD sufferers sit at a bright light box for 30 minutes at breakfast time.

运用光照疗法，患者需要在吃早餐的时候坐在一个光线强烈的盒子前长达30分钟。

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Improvement was seen in 57 percent of subjects in the bright light therapy, and 50 percent of those in the dawn simulation group.

接受光照疗法的患者中，有57%的人症状得到了改善；而接受日出模拟治疗的患者，症状得到改善的人数比例是50%。

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Light therapy (such as from exposure to the sun or another bright light) may also help get you back on track.

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Unfortunately, to reap the benefits of the Optimal Light Therapy System, you have to spend 30 minutes with your face in front of a blinding, bright light.

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