Block toxic light with these glasses: https://truedark.com/discount/DAVETUBEThink 8 hours of sleep is enough? Think again. I used to think I had a sleep issue—turns out, it was a light issue. In this video, I break down why light exposure, not just sleep duration, controls your circadian rhythm, energy, and recovery. From morning sunlight to blocking blue light at night, I’ll show you how to biohack your environment for deeper sleep, better performance, and real recovery. Your biology is programmable—let’s upgrade it.Thank you to our sponsors! -Dave Asprey's 2026 Clean Nicotine Roadmap | Enroll for free at: daveasprey.com/2026-clean-nicotine-roadmap-Generation Lab | Go to http://generationlab.com/, use code Dave20 for $20 off, and see what your body’s really doing behind the surface.Resources:   • Get My 2026 Clean Nicotine Roadmap | Enroll for free at https://daveasprey.com/2026-clean-nicotine-roadmap/ • Dave Asprey's Latest News | Go to https://daveasprey.com/ to join Inside Track today.  • Danger Coffee: https://dangercoffee.com/discount/dave15   • My Daily Supplements: SuppGrade Labs (15% Off)   • Favorite Blue Light Blocking Glasses: TrueDark (15% Off)   • Dave Asprey’s BEYOND Conference: https://beyondconference.com   • Dave Asprey’s New Book – Heavily Meditated: https://daveasprey.com/heavily-meditated  • Join My Substack (Live Access To Podcast Recordings): https://substack.daveasprey.com/ • Upgrade Labs: https://upgradelabs.com  Chapters:0:00 – Introduction0:38 – The Real Reason You're Still Tired0:59 – How Light Controls Your Sleep Quality1:36 – Circadian Rhythm Explained (NASA-Approved)2:51 – The Secret Sleep Trigger5:29 – Blue Light: The Silent Sleep Killer6:12 – How to Hack Your Evening Light7:52 – Screen Time vs. Sleep Time8:12 – Social Jet Lag: The Weekend MistakeSee Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.