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PODCAST

Sunlight Matters

Welcome to Sunlight Matters, the podcast that illuminates the incredible power of the sun and its impact on our health, well-being, and way of life.From its essential role in vitamin D production and mental health to its influence on architecture, urban planning, and sustainability, the sun shapes our world in ways we’re only beginning to understand.In each episode, podcast host Dave Wallace will chat with experts—from scientists and health professionals to designers and outdoor enthusiasts—to

health & fitness

All Episodes

84:16

Surviving Winter with Sunlight – A Conversation on...

Sunlight Matters ·

2025/10/30

In this companion episode to the Roger Seheult episode, Dave is joined by three experts—Prof. Glen Jeffery, Scott Zimmerman, and Dr. Bob Fosbury—to explore how sunlight and infrared light influence human health, particularly in the darker months when Seasonal Affective Disorder (SAD) becomes more prevalent. Dave opens up about his own experience with SAD, leading to a wide-ranging discussion of how modern indoor lighting, architecture, and urban planning fail to meet the biological needs shap...

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58:38

Surviving Winter. You don't need to be SAD with Dr...

Sunlight Matters ·

2025/10/22

As winter approaches in the North, the days get shorter, the skies darker, and for many of us, our energy, mood, and health start to dip. In Part 1 of a 2-part special of Sunlight Matters, Dr Roger Seheult joins Dave and Georg to share science-backed tips to help you stay healthy, energized, and resilient through the long winter nights. From understanding the hidden power of infrared light to simple daily routines that boost your immune system and mood, this episode is packed with practical a...

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38:22

Light, Rights & Urban Fights: Daylight in a...

Sunlight Matters ·

2025/10/09

In this thought-provoking episode of Sunlight Matters, we travel across Europe to explore how daylight access, sunlight rights, and urban densification intersect—and often clash. Joining us are three brilliant minds working at the forefront of daylight analysis and sunlight legislation: 🌞 Mina Gaarder – A Civil Engineer based in Norway who recently completed a master’s thesis on daylight in dense urban areas, comparing regulatory frameworks in Norway, Sweden, the UK, and the U.S. She brings

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57:21

Fitness, the Sun and Winter Protocols

Sunlight Matters ·

2025/09/25

In this episode, we are joined by David Herrera, better known online as The Solar Athlete, who brings a unique blend of engineering, biology, and real-world coaching to the conversation. From his backyard in high-altitude Wyoming, David shares the incredible journey that took him from world-class powerlifter and oilfield technician to a leading voice on circadian biology, light hygiene, and solar optimization for human performance. In this episode, we dive into: ☀️ Why sunlight exposure...

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49:24

Sunlit Computers with Peter Veto and Liliana Lettier...

Sunlight Matters ·

2025/09/19

What if your computer screen could heal you instead of harming you? In this episode of Sunlight Matters, we’re joined by Dr Peter Veto and Liliana Lettieri, the visionary team behind Pixun — a company pioneering solar-powered, full-spectrum displays that use real sunlight instead of artificial backlighting. Peter and Liliana share their personal journeys with light sensitivity, screen-induced insomnia, and EMF-related health issues, and how those struggles inspired them to engineer a radicall...

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77:34

From Riot Police to Sunlight Healer: Theresa Bug on...

Sunlight Matters ·

2025/09/04

In this powerful and eye-opening episode, Dave speaks with Theresa Bug, a former German police officer turned online health coach, holistic nutritionist, and advocate for natural light, grounding, and mitochondrial health. 🌿 Theresa shares her inspiring journey from a high-stress career in law enforcement—across Paris, London, Israel, and Africa—to deep healing through sunlight exposure, circadian rhythm restoration, and reconnecting with nature. Her story is a testament to the life-changing

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30:08

Designing with Sunlight: Viktoria Neumueller on...

Sunlight Matters ·

2025/08/25

In this illuminating episode, we're joined by Austrian engineer Viktoria Neumueller, a passionate advocate for sunlight-optimized architecture and energy-efficient building design. With a background in planning heating, cooling, and ventilation systems, Viktoria brings rare insight into how thoughtful building orientation and solar exposure can dramatically reduce heating costs, enhance comfort, and even transform quality of life. We dive deep into: Why shadow mapping and sunlight analysis sh...

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41:07

The Light Prescription: Sunlight, Infrared,...

Sunlight Matters ·

2025/08/01

In this episode, Dave discusses with Professor Glen Jeffery, a neuroscientist at University College London’s Institute of Ophthalmology, whose research investigates how light, particularly long-wavelength red and infrared, influences human health, metabolism, and ageing. Glen is recognised as one of the world's leading researchers in exploring how light interacts with our bodies. Glen explains how sunlight penetrates the body, enhancing mitochondrial function, improving vision, an...

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47:43

The Life-Changing Power of Sunlight: Light as...

Sunlight Matters ·

2025/07/24

Dave speaks with Dr. Nicholas Witton, a sleep medicine and light researcher, about the critical role of natural light, especially near-infrared (NIR) light, in human health. Nicholas explains how we've shifted from living outdoors to spending over 90% of our time indoors under artificial light, particularly LEDs, which emit mainly blue light and lack the full spectrum, including the NIR wavelengths that make up over 50% of solar energy. They explore how NIR light supports mitochondrial functi...

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38:22

Built to Thrive: Light, Health & the Future of...

Sunlight Matters ·

2025/07/15

What if your home or office is silently shaping your health, your mood, and even your future? In this eye-opening episode, Dave sits down with Dr. Mandana Khanie, Lecturer in Health and Wellbeing in Sustainable Buildings at UCL and Deputy Director of the Light and Lighting MSc Program. Together, they explore how the architecture of our indoor lives, where we now spend 90% of our time, profoundly impacts our biological rhythms, mental health, and long-term wellness. Mandana shares her unique j...

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37:16

People, Buildings and Light

Sunlight Matters ·

2025/06/25

In this illuminating episode of Sunlight Matters, David Wallace is joined by Niko Gentile and Agnieszka Czachura from Lund University’s Energy and Building Design group. Together, they explore the science, perception, and policy around sunlight and daylight, and why we need to care more than ever. From the overlooked distinction between daylight and sunlight to the historical biases in building regulations, Niko and Aga take us on a fascinating journey. We discuss Agnieszka's new research int...

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42:08

Buildings and Light with Paul Rogers

Sunlight Matters ·

2025/05/12

In this episode of Sunlight Matters, Dave welcomes daylight and lighting expert Paul Rogers of ACC Glass and Facade Consultants. Broadcasting from Stockholm and the UK, they explore the profound impact of sunlight and daylight on architecture, urban planning, and human well-being. From the technical distinctions between daylight and direct sunlight to the emotional resonance of a well-lit home, Paul shares decades of experience shaping buildings around solar exposure. The episode touche...

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47:05

Sunlight and health in our modern lives with Arne Lowden

Sunlight Matters ·

2025/04/24

In this episode of Sunlight Matters, hosts Dave and Georg welcome Swedish sleep and light researcher Arne Lowden for a fascinating conversation about the science of light, circadian rhythms, and how our bodies and minds are profoundly shaped by solar exposure. Dr. Lowden, author of the book Survive the Winter, shares powerful insights into how lack of natural light affects sleep, mood, and long-term health, especially in northern climates. We explore the hidden costs of indoor living, the rea...

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23:55

Masterkey with Giulio Colleluori

Sunlight Matters ·

2025/03/20

Welcome to the second episode of Sunlight Matters. In this episode, we explore the fascinating connection between real estate, artificial intelligence, and the importance of sunlight with Giulio, the founder of Masterkey. Masterkey is revolutionizing the home buying experience by giving buyers the tools to make more informed decisions through AI-powered property analysis. One of the most exciting features of Masterkey is its integration of sunlight mapping, a game-changer for anyone looking t...

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25:07

Shadowmap with Georg Molzer

Sunlight Matters ·

2025/03/04

In this episode of Sunlight Matters, host David Wallace interviews Georg, the founder and CEO of Shadowmap, a platform designed to visualize sunlight and its effects on various environments. Georg shares his personal journey, the technological innovations behind Shadowmap, and its applications in real estate and health. The conversation emphasizes the importance of sunlight for well-being and how Shadowmap can help users make informed decisions about property and solar energy.

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