Sunlight exposure is a natural mood booster. It triggers the brain's production of serotonin, decreasing anxiety and giving a sense of well-being. Sunlight also helps reset the body clock each day, keeping sleep and other biological rhythms in sync.
During the short, cold, cloudy days of winter, an artificial light box can substitute effectively for missing sunlight. In fact, 30 minutes in front of a bright light box each day can help drive away the winter blues.
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