Case study: dawn simulation as maintenance treatment in a nine-year-old patient with seasonal affective disorder.

After four winter seasons of successful treatment with light boxes, a 9-year-old patient with seasonal affective disorder refused to make further use of the light box. Instead he was treated with dawn simulation (a dim light administered just before waking up and gradually increased in intensity). The patient used dawn simulation therapy from October until mid-May, with an occasional variation of the maximum light intensity (100, 200, or 300 iux). The patient, his parents, and his teacher were all happy with this type of treatment.