[Positive effect of bright light therapy on mood and sleep quality in institutionalized older people].

Introduction: Bright light exposure during the day has a positive effect on health and its deficit can cause multiple physiological and cognitive disorders, including depression. The aim of this study was to evaluate the effect of bright light therapy (BLT) on the quality of sleep and mood emotional state; cognitive status, global deterioration and quality of life in institutionalized elderly.

Material And Methods: This is a study with repeated measures design.