Focusing on my light exposure has helped my delayed sleep phase disorder immensely. I used to sleep from noon to 6pm. I now sleep consistently between 4 am and

Focusing on my light exposure has helped my delayed sleep phase disorder immensely. I used to sleep from noon to 6pm. I now sleep consistently between 4 am and 11 am, a huge improvement. I make sure I get plenty of natural light immediately when I wake up and continuously throughout the day. I set my bulbs to 5000K on full-brightness during the day, then dim and change them to 2200K in the evening. After 10pm I do not use ceiling lights, only lamps with hue bulbs. After midnight I change the lamp bulbs to red and set them to 10% (I use HomeAssistant to make automate all this). An hour before I go to bed, I use no lights other than a small flashlight with a red LED on the nightlight setting. I avoid all electronics after midnight other than my kindle on it's lowest light setting. After making all these changes and sticking to them for 5 months I no longer need to take any sleeping aids which didn't work well anyway. The hardest part was changing when I workout, eat, work, etc. as I was so used to doing all those things overnight for the past 10+ years. This conversation was very insightful to me: https://vid.puffyan.us/watch?v=oUu3f0ETMJQ https://vid.puffyan.us/watch?v=oUu3f0ETMJQ I understand some may not like the interviewer, but here is the wiki on Dr. Samer Hattar: https://en.wikipedia.org/wiki/Samer_Hattar https://en.wikipedia.org/wiki/Samer_Hattar