Here are some studies on bright light therapy (you know… like SUNLIGHT):
Conclusion: Overview of the research showing how bright light therapy has been found to be effective for improving behavior and quality of life in elderly people with dementia.
Conclusion: Bright light therapy is an effective treatment for improving cognitive performance in people with dementia.
Effects of Bright Light on Cognitive and Sleep–Wake (Circadian) Rhythm Disturbances in Alzheimer-Type Dementia (2000)
Conclusion: This study found bright light therapy to be an effective treatment for improving the circadian rhythm and cognitive performance in elderly dementia patients.
Conclusion: Bright light treatment was found to alleviate depression faster than medication.
Conclusion: In a randomized control trial experiment involving 96 seasonal affective disorder patients, three weeks of bright light treatment proved to have a significant antidepressant effect.
Conclusion: More natural morning light therapy was found to be more effective as an antidepressant compared to evening light therapy.
Conclusion: In a 6-month randomized control trial comparing the effects of 10,000 lx bright light with 500 lx placebo light on women with late luteal phase dysphoric disorder, it was found that bright light therapy (you know, like SUNLIGHT) was effective for significantly reducing PMS symptoms and improving mood.
Randomized, DIM Light Controlled, Crossover Test of Morning Bright Light Therapy for Rest-Activity Rhythm Disorders in Patients with Vascular Dementia and Dementia of Alzheimer’s Type (1998)
Conclusion: This study found that bright light therapy improved sleep and the sleep/wake cycle of elderly dementia patients.
Conclusion: Blind people need bright light exposure (or sunlight exposure) too, but they’re less likely than other people to go and get it and this can cause problems with their sleep/wake cycle. In this study bright light exposure was found to be helpful for suppressing melatonin in blind people, which is important for waking up your brain up, getting yourself on a good sleep/wake cycle, and reducing insomnia.
Morning Bright Light Therapy for Sleep and Behavior Disorders in Elderly Patients with Dementia (1994)
Conclusion: Morning bright light therapy was shown to be effective for improving sleep and behavior disorders in demented elderly patients.
Bright Light Treatment of Behavioral and Sleep Disturbances in Patients with Alzheimer’s Disease (1992)
Conclusion: “Evening bright light pulses may ameliorate sleep-wake cycle disturbances in some patients with Alzheimer’s disease.”