Episode:

In this special episode of Sunlight Matters, David Wallace sits down with Shadowmap founder and CEO Georg Molzer to reflect on the journey behind Shadowmap, humanity’s relationship with the Sun, and the launch of a genuine world first: Sunscore — the first property-specific sunlight metric, now live on Redfin.

Together, they explore:

• Why sunlight profoundly shapes health, wellbeing, and human experience
• How Shadowmap began from a simple craving for winter sunlight in Vienna
• The philosophy behind visualizing sunlight and shadow in 3D
• Why Sunscore could fundamentally change real estate search
• The future of environmental intelligence, AI, and sunlight-aware living
• Startup lessons, luck, and building breakthrough technology from Austria

This episode is both a reflection on the past and a look into the future — where sunlight becomes measurable, searchable, and central to how we design and choose the spaces we inhabit.

Key Topics Covered

☀️ Why the Sun Matters

Georg shares his deeply personal relationship with sunlight and explains why he increasingly sees the Sun not simply as light, but as the core energy source for life itself.

🏙️ The Origins of Shadowmap

The story begins in wintertime Vienna, where dense urban shadows and limited winter sunlight inspired Georg to build a tool that could help people find sunlight anywhere in the world.

🗺️ What Shadowmap Actually Does

A discussion about Shadowmap as a global 3D sunlight visualization platform:

• Real-time shadow mapping
• Sun-path analysis
• Seasonal sunlight simulation
• Solar exposure visualization
• Environmental intelligence for the built world

🏡 Introducing Sunscore

The major announcement:
Shadowmap and Redfin have launched Sunscore — the world’s first property-specific sunlight score.

The episode explores:

• How Sunscore works
• Why sunlight matters to homebuyers
• The value of natural light in real estate
• Why Redfin recognized sunlight as a missing property metric
• The future potential of sunlight-based property intelligence

🧠 AI, Conversational Search & Environmental Data

The conversation explores how Sunscore transforms sunlight into structured, machine-readable data that can power:

• AI systems
• Conversational real estate search
• Property recommendation engines
• Environmental analytics

🌱 Health, Circadian Biology & Morning Light

David and Georg discuss:

• Morning sunlight
• Circadian rhythms
• Skin adaptation to sunlight
• Infrared light
• Sunlight as a health input rather than simply an aesthetic feature

🚀 Building a Startup Around the Sun

Georg shares candid reflections on:

• Entrepreneurship in Austria
• Raising investment for unconventional ideas
• Finding alignment with investors and teams
• Why mission-driven startups require deep conviction

🌍 The Bigger Mission

The episode closes with Shadowmap’s long-term vision:

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.

In this episode, our guest is Christina Friis Blach, co-founder of Lys Technologies, about how light shapes our health, performance, and daily lives.

They explore how sunlight exposure and circadian rhythms influence sleep, hormones, and energy—and why modern indoor environments often disrupt this balance.

Christina shares how her company is helping bridge the gap between science and real life through wearable light technology and sunlight analysis tools.

☀️ About Lys Technologies

Lys Technologies develops wearable sensors that measure the light you’re actually exposed to throughout the day—close to the eye, where it matters biologically.

Unlike traditional light meters used in architecture, their technology focuses on human-centric lighting, tracking how light impacts:

• Circadian rhythms and sleep
• Hormone regulation (melatonin, cortisol)
• Daily energy and performance

Their tools are used globally across research, healthcare, workplace design, and even elite sports—helping drive better sunlight analysis, building design, and behavior change.

☀️ Key Takeaways

• Light is a biological signal, not just for vision
• Modern lighting can disrupt circadian rhythms
• Wearable sensors enable real-world solar exposure tracking
• Natural light is critical in real estate and building design
• Shadow mapping and sunlight analysis are shaping healthier spaces

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.

In this thought-provoking episode, we sit down with Jonathan Jarecki, a 20-year-old pre-med student exploring the frontier of light biology, mitochondrial function, and the hidden impact of our modern indoor lifestyle.

What begins as a conversation about holistic health quickly evolves into a powerful exploration of how sunlight exposure, artificial lighting, and our disconnection from nature may be influencing everything from energy levels and brain function to chronic disease and mental health.

Jonathan shares his personal journey, from being raised in a household focused on lifestyle-based healing to diving into the scientific literature to understand why these approaches work. Along the way, he uncovers a missing piece in modern health conversations:

👉 Light is not just important—it may be foundational.

🌞 Sunlight vs Modern Living

We live in a world where:

• Most of our time is spent indoors
• Artificial LED lighting dominates our environment
• Morning sunlight exposure is rare
• Screen time is constant

Yet human biology evolved under full-spectrum natural sunlight.

This episode explores how that mismatch may be contributing to:

• Rising chronic disease
• Hormonal disruption
• Poor sleep and circadian misalignment

⚡ The Mitochondria Connection: Are We Light-Powered?

One of the most fascinating parts of the conversation dives into the science of mitochondria—the energy engines of our cells.

Jonathan breaks down complex biology into simple ideas, explaining how:

• Mitochondria convert food into usable energy (ATP)
• Light—especially red and infrared wavelengths—interacts directly with these systems

This raises a profound idea:

👉 Humans may not just run on food—we may also be deeply influenced by light as an energy source.

🧠 Light, Brain Function & Attention

The conversation also explores how light shapes:

• Brain chemistry
• Cognitive performance
• Mood and perception

From morning sunlight exposure to outdoor environments, we discuss how something as simple as getting outside early in the day can:

• Improve focus and clarity
• Regulate dopamine
• Reduce dependence on screens
• Support long-term mental health

In contrast, modern habits, like waking up and immediately scrolling, may be working against our biology.

🔬 Questioning Modern Science & Medicine

This episode doesn’t just explore light—it challenges how we think about health itself.

Jonathan highlights:

• The limitations of reductionist science
• The ongoing replication crisis in research
• The need for open-minded, systems-based thinking

Rather than viewing the body as separate parts (brain, gut, heart), we explore a more integrated model:

👉 The body as an interconnected energy system, influenced by light, environment, and lifestyle.

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.