The symptoms of light can be a one-time treatment, symptoms of serious points to 2-3 times treatment, the time interval is generally 1 weeks.

对症状轻的可一次性治疗，症状严重点的要2 - 3次治疗，时间间隔一般为1周。

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Researchers found that too much artificial light at night can alter mood and lead to similar symptoms to depression such as lack of energy and enthusiasm.

研究发现，夜里接触过多人造光线可能会改变心情，导致类似抑郁的病症，比如，缺少精力和热情。

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A certain efficacy, symptoms can be a light treatment of patients (about 3 months) symptoms improved within one year after the observation without recurrence.

取得一定疗效，症状轻的病人能够一个疗程(大概3个月)症状好转，停药后一年观察无复发。

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