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How to Fix Your Indoor Lighting for Circadian Health

Practical Takeaways from Circadian Doctor Martin Moore-Ede

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Aastha JS
Jul 27, 2026
∙ Paid

Breast cancer was rare before the light bulb. Dr. Martin Moore-Ede believes the LED bulbs in nearly every home are a big part of why hormone driven cancers like breast and prostate cancer are on the rise. He also discusses how LED bulbs might be contributing to diabetes and heart disease.

Dr. Moore-Ede discovered the master clock in the human brain and spent over two decades on the Harvard Medical School faculty. He has spent 50+ years studying circadian biology and is the author of The Light Doctor. I recently released a podcast episode with him. This post is the companion to the episode: every key idea explained simply, and what to actually do about it.

In This Bonus Takeaways, I Cover:

  1. Why the LED bulbs in your home may be fueling cancer

  2. Why melatonin is not the sleep hormone you think it is

  3. How there is no blue light in nature after sunset, but your bulbs are full of it

  4. The one specific blue your body clock runs on, and how LEDs get it wrong!

  5. Why the red and infrared your cells need for energy are missing from every LED

  6. Why banning the incandescent bulb was a mistake

  7. Why avoiding the sun may be shortening your life, not protecting it

  8. Why “night owls” are a myth

  9. Why living on the wrong side of a time zone raises your risk of cancer

  10. Why your kids are going short-sighted, and the light that prevents it

  11. Which blue-light glasses actually work (most block the wrong blue)

  12. The exact lighting changes to make, morning to night, to align your circadian health and prevent disease risk

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