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The clock isn’t just on your wall—it’s in your cells. As autumn settles in and daylight wanes, we dig into how light acts as information for your biology, shaping sleep depth, hormone timing, and metabolic health. A standout 15-year cohort of 200,000+ children links persistent artificial light at night to higher obesity risk, and it pairs with wearable data from tens of thousands of people that reveals how little real sunlight most of us get—even at the height of summer.
We break down what’s actually happening under the hood. Blue-heavy light is a powerful morning cue, but after dusk it sends the wrong signal, suppressing melatonin, shrinking deep sleep, and nudging insulin rhythms off track. That chronic mismatch adds up, especially for kids. Beyond the usual vitamin D narrative, we talk about why full-spectrum sunlight—including infrared—matters for mitochondria, vascular function, mood, and focus, and why energy-efficient LEDs often strip out the very wavelengths that buffer blue and support recovery.
You’ll also get a practical, science-backed playbook you can start tonight. We cover morning outdoor light routines, how to set up your home with full-spectrum lamps for daytime and zero-blue bulbs for evenings, and why programmable circadian lights are a smart upgrade for fall and winter. We share simple screen hygiene, when blue-blocking glasses help, and how to navigate harsh indoor lighting without wrecking your sleep. The goal is coherence: brighter, broader mornings; softer, blue-free nights; and consistent cues your body can trust. If you’re ready to trade “junk light” for light that works with you, not against you, hit play and build your seasonal routine. Enjoyed the conversation? Follow, rate, and share the show with someone who needs a gentler evening glow.

For copies of slide deck: www.thehealthedgepodcast,com

SolShine: https://solshine.org/

Soraa Zero Blue Light Bulbs: https://store.soraa.com/zeroblue/

Korrus OIO programmable circadian lighting: https://www.korrus.com/oio/