The Light-Heart study is randomized, double-blind, controlled trial of 8 weeks of morning BWL therapy, compared with DRL in older, Stage B HF patients with clinically significant levels of depressive symptoms. The primary hypothesis of the proposed study is that compared to DRL, BWL therapy will be associated with a significantly greater reduction in depressive symptoms. Important information about compliance and tolerability associated with the BWL intervention in Stage B HF patients will also be gathered. The investigators will examine whether BWL therapy is associated with greater improvements in quality of life and subjective functioning compared to DRL. Finally, the researchers will investigate whether BWL is associated with a sustained improvement in depressive symptoms 2 and 4 weeks following the end of the intervention compared to DRL.