Episode 139 | Light as a Conductor | How to Orchestrate Better Sleep, Mood, and Metabolism
Most of us live in a light-deprived world. We spend less than 15 minutes outside daily—despite thinking we're outdoors for hours—leaving our circadian rhythms dangerously misaligned. In this episode, Dr. Jamie Zeitzer and Lucas Tang of Lumos Glasses break down how light acts as a conductor, orchestrating every system in your body: your sleep, mood, metabolism, and immune function. You'll discover why the contrast between bright days and dark nights matters more than total light exposure, why morning light directly impacts serotonin production and depression risk, and how light therapy works synergistically with SSRIs. Whether you have outdoor access or not, they share practical, evidence-backed tools to reclaim your natural rhythm—from outdoor time to Lumos Glasses, a fashionable light-therapy solution for those who can't get consistent daylight. This episode cuts through outdated light-therapy advice and equips you with science-grounded strategies to transform your health from the inside out.
Most of us live in a light-deprived world. We spend less than 15 minutes outside daily—despite thinking we're outdoors for hours—leaving our circadian rhythms dangerously misaligned. In this episode, Dr. Jamie Zeitzer and Lucas Tang of Lumos Glasses break down how light acts as a conductor, orchestrating every system in your body: your sleep, mood, metabolism, and immune function. You'll discover why the contrast between bright days and dark nights matters more than total light exposure, why morning light directly impacts serotonin production and depression risk, and how light therapy works synergistically with SSRIs. Whether you have outdoor access or not, they share practical, evidence-backed tools to reclaim your natural rhythm—from outdoor time to Lumos Glasses, a fashionable light-therapy solution for those who can't get consistent daylight. This episode cuts through outdated light-therapy advice and equips you with science-grounded strategies to transform your health from the inside out.
Resources mentioned:
• Dr. Jamie Zeitzer (circadian rhythm researcher)
• Lucas Tang (Lumos Glasses co-founder)
• Lumos Glasses (light-therapy eyewear)
• Happy Light (light therapy lamp)
• NHANES (National Health and Nutrition Examination Survey)
• US Bureau of Labor Statistics Time Use Survey
• OSHA workplace lighting standards
• UBC landmark study (light therapy + fluoxetine for depression)
• Fluoxetine (SSRI medication)
Links mentioned:
Circadian Rhythm and Light Therapy Guide here: https://dradamrinde.kit.com/5320da545b
Sponsorship Mentioned: Pulsetto: Listen for special code mentioned in the episode https://pulsetto.sjv.io/jed7KM
Links:
• Lumos Glasses: https://www.lumosglasses.com
• Lumos Glasses on LinkedIn: https://www.linkedin.com/company/lumosglasses/
• Lumos Glasses on Instagram: https://www.instagram.com/lumosglasses
• Lucas Tang on LinkedIn: https://www.linkedin.com/in/lucaswencanada
• Dr. Jamie Zeitzer on LinkedIn: https://www.linkedin.com/in/jamie-zeitzer-7888185/
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Dr. Jamie Zeitzer is a circadian physiologist who specializes in how light impacts circadian rhythms. He received his Ph.D. at Harvard, and is now Co-Director of the Center for Sleep and Circadian Sciences at Stanford University, where he is also an associate research professor of psychiatry and sleep medicine.
Dr. Zeitzer has published numerous studies on sleep, insomnia, circadian science, and even discovered a pioneering treatment for jetlag. Plus, he’s contributed to publications like The New York Times, The Washington Post, The Guardian, The Wall Street Journal, Consumer Reports, and NPR.
Dr. Zeitzer is a member of Stanford Bio-X, the Wu Tsai Human Performance Alliance, the Maternal & Child Health Research Institute (MCHRI), and the Wu Tsai Neurosciences Institute.
I’m an inventor, founder, and product systems engineer focused on smart glasses, AI hardware, optics, photobiology, and human-centered wearable technology.
I founded Lumos Health to build smart light therapy glasses that make circadian health practical in daily life. The work combines near-eye optics, wearable electronics, photobiology, app and cloud systems, clinical research, and user experience, with granted patents, published research, clinical validation, and standards participation.
At Meta Reality Labs, I work on advanced consumer hardware and smart-glasses-related systems, translating research and technical insight into product concepts, prototypes, and roadmap-shaping architectures.
Before Meta and Lumos, I worked across consumer hardware and product design at Apple, Xiaomi, and other engineering organizations. I trained in mechanical and mechatronics engineering at the University of Waterloo.
Cat dad, trail runner, erhu player, baritone, and perpetual tinkerer in nature-inspired design.
