SAD, Depression, Anxiety, & PTSD

Mayo Clinic - Light Therapy 
SAD / Depression
https://www.mayoclinic.org/tests-procedures/light-therapy/about/pac-20384604

American Psychological Association - Bright Lights, Big Relief 
Seasonal Affect Disorder
https://www.apa.org/research/action/light

Psychiatric Times
Light Treatment for Non Seasonal Depression
https://www.psychiatrictimes.com/view/light-treatment-nonseasonal-depression

Harvard Health
The Psychiatry of Light
https://cdn.shopify.com/s/files/1/0307/3956/2541/files/Harvard_Medical_The_Psychiatry_of_Light..pdf?v=1604808173

BMC Psychiatry
Does bright light have an anxiolytic effect?
https://bmcpsychiatry.biomedcentral.com/articles/10.1186/1471-244X-7-62

Health 
Seasonal Blues? Lack of Blue Light May Be to Blame
https://www.health.com/condition/depression/blue-light-mood

Med Page Today
Blue Light Exposure May Help Treat PTSD
https://www.medpagetoday.com/meetingcoverage/apss/80484