178: A Lighting Industry Insider on Why the Shift to LEDs May Be a Public Health Disaster

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Ulysse Dormoy has spent 36 years in the lighting industry, watching it transform from analog to digital — and more recently, from a purely visual technology into something with profound implications for human health. In this conversation, Ulysse brings a rare perspective: a lighting industry insider who has followed the science of light and biology deep enough to conclude that his own industry may be part of the problem.

He and his colleague Jeremy Fielding took spectrometers into the retail stores of Oxford Street and Regent Street in London to measure light quality in environments that should, above all others, be getting it right. What they found was revealing — and in some cases, absurd. He also shares how wearable light-measuring technology exposed just how little infrared light he was absorbing on even his most "outdoorsy" days — and what that means for the rest of us spending our lives under LED lighting.

Ulysse draws a compelling parallel between the industrialization of food and the industrialization of light: we've been fed, but we're not being nourished. And he makes the case that red light panels, now booming as a consumer wellness product, are simply supplementation for something our indoor environments have quietly stripped away.

Timestamps

• 00:00 Light and the Modern Health Crisis
• 01:06 Meet the Lighting Insider
• 03:47 From Analog Lighting to LEDs
• 06:55 Flicker, Drivers, and Hidden Effects
• 10:08 Why Spectral Quality Matters
• 11:00 Retail Lighting Experiment
• 12:28 Where Beauty Stores Get It Wrong
• 16:01 Why Retail Lighting Needs to Improve
• 19:34 Discovering the Biology of Light
• 24:32 The Human Sustainability Perspective
• 28:05 Light as a Form of Nutrition
• 30:52 Understanding Bulb Labels and Metrics
• 33:15 Origins of Life and Energy
• 35:24 When Efficiency Priorities Backfire
• 36:45 Light as Prevention
• 38:18 Rethinking Light Measurement
• 40:40 Sunlight vs Artificial Light
• 42:59 Living Indoors Like a Space Station
• 46:09 What Light Really Is
• 49:06 Policy, Hospitals, and Lighting
• 52:51 Anecdotes vs Evidence
• 58:45 Measuring Light With Wearables
• 01:03:35 Screens and Indoor Living
• 01:09:33 Real-Time Biometrics
• 01:12:27 Closing Thoughts and Show Notes

Connect with Ulysse Dormoy

Website: www.atrium.ltd.uk

Socials: https://www.linkedin.com/in/ulyssedormoy/

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