We assessed the efficiency of bright light therapy as an adjuvant treatment to antidepressant pharmacotherapy in patients with severe MDD randomized by Hamilton Depression Rating Scale ( HDRS ) score to either ( 1 ) 150 mg venlafaxine hydrochloride daily at 7:00 AM or ( 2 ) 150 mg venlafaxine plus 60-minute light of 7000 lux the initial week of clinical management ( venlafaxine + bright light therapy ) daily at 7:00 AM .