This study is a randomized control trial designed to test the effectiveness of Cognitive Behavioral Therapy and Bright Light Therapy for treating insomnia and fatigue seen in patients with pulmonary arterial hypertension. For 8 weeks, 12 subjects will receive Bright Light Therapy via the Re-timer device, while 12 other subjects will receive Cognitive Behavioral Therapy via a trained professional. The remaining 12 subjects will remain as a control group.