Daytime exposure to bright lights may improve a person’s quality of sleep, and could reduce depressive symptoms and agitation associated with dementia
Source:
https://www.newscientist.com/article/2228008-light-therapy-device-helps-improve-some-symptoms-of-dementia/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home