Increase Brain Blood Flow in Vegetative Patient Red Light Dose
830 nm, 11.4 mW/cm^2, 1800 s, 2/day/73 days (146) improved blood flow and correlated with patient regaining cognition.
Brain
Decrease Anxiety Red Light Therapy Dose
830 nm continuous wave, average irradiance 30 mW/cm^2, on forehead reduced anxiety symptoms
Depression and Alcoholism Red Light Therapy Dose
514 nm at 100 mW/cm^2 for 50 to 300 seconds, 5 pulses per second. 633 nm at 25 mW/cm^2 for 50 to 300 seconds, 5 pulses per second stimulates endorphines and reduces depression.
Red Light Through Eyelids Reduces Sleepiness Dose
615 to 635 nm of pulsed light with a maximum power of 35 mW over eyes while sleeping for periods up to 20 seconds.
Red Light Halts Brain Memory Tissue Damage
Red light therapy even at low power stops the oxidative stress that damages memory and learning brain areas.
Blue Light Can Cause Brain Damage and Aging (study summary)
Blue light exposed flies developed brain damage and locomotion disability. This probably can extrapolate to humans.
Red Light During Sleep Reduces Sleepiness, But Not Melatonin (study summary)
Wearing a red light mask while sleeping led to greater alertness upon waking, and better self-reported feelings of being awake. Wearing red light goggles upon waking also reduced sleep inertia, but not as much as the mask.