In this fascinating and deeply thought-provoking episode of Sunlight Matters, Dave Wallace sits down with four leading thinkers from radically different disciplines to explore a provocative new scientific theory.

The discussion centres on a groundbreaking new paper, Editing the Sun: How Indoor Light Lost Touch with Biology, which explores how changes in modern lighting — particularly the shift away from sunlight and infrared-rich light — may be influencing metabolism, mitochondrial function, ageing and chronic disease.

Joining Dave are:

• Bob Fosbury
• Glenn Jeffrey
• Roger Seheult
• Scott Zimmerman

Together, they explore an extraordinary idea: that sunlight may play a direct role in supporting mitochondrial function — not by providing energy in the same way plants use photosynthesis, but by acting more like a “lubricant” for metabolism.

The conversation ranges from mitochondrial biology and quantum chemistry to hospital design, chronic disease, sunlight deficiency, LEDs, evolution and why our bodies may be far more tuned to the Sun than we realise.

Could modern lighting be contributing to rising metabolic disease? Why do patients recover better with sunlight? And have we accidentally designed environments that are biologically mismatched to human health?

This episode explores the science, the implications and why this emerging field could fundamentally reshape how we think about buildings, health and public policy.

In this episode we discuss:

• The theory behind Editing the Sun and what “photometabolism” means
• Why mitochondria may be biologically tuned to sunlight
• How infrared light could influence energy production in cells
• Why sunlight may help reduce metabolic damage over time
• The relationship between light, diabetes, obesity and chronic disease
• What astronauts can teach us about life without sunlight
• The unintended health consequences of modern LED lighting
• Why hospitals are beginning to rethink sunlight access for patients
• The concept of biological “Goldilocks zones” for human health
• Why interdisciplinary science may unlock major future breakthroughs

Key Takeaway

The panel argues that sunlight is not merely something we see or feel — it may be a deeply embedded biological requirement, woven into the evolution of life on Earth. While more research is needed, the implications for health, architecture, medicine and everyday life could be profound.

Is sunlight one of the missing foundations of modern health?

Sunlight Matters is a podcast exploring the role of the Sun in human health, architecture, cities, and everyday life.

Through conversations with scientists, architects, and technologists, the series examines how natural light shapes our bodies, our buildings, and the way we live indoors.

Hosted by Dave Wallace, Sunlight Matters asks a simple but overlooked question: what happens when we disconnect from the Sun?

Because sunlight isn’t optional. It matters.

Please do not forget to Like and Subscribe.