Biocentric Lighting for Better Sleep, Recovery, and Performance with Kyle Harris of BrainLit
The Ready State Podcast
Kelly Starrett & Juliet Starrett
4.9 • 623 Ratings
🗓️ 19 March 2026
⏱️ 65 minutes
🧾️ Download transcript
Summary
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Are you getting the right light signals to perform at your peak? Most of us spend nearly 90 percent of our time indoors, missing the critical biological triggers our bodies need for sleep, recovery, and focus. In this episode of the Ready State Podcast, we dive deep into the world of biocentric lighting and how you can optimize your environment to match your natural circadian rhythm.
Kyle Harris, CEO of BrainLit, joins Kelly and Juliet Starrett to explain why light should be viewed as a biological signal rather than just a way to see. We explore the massive impact that light spectrum and modulation have on our health, from professional athletes in the NBA and NHL to surgeons and shift workers in hospitals. Learn how passive changes to your environment can act as a force multiplier for your health, helping you sleep better and recover faster without adding another task to your busy to do list.
What You'll Learn in This Episode- Why light is a biological signal, not just something that helps you see
- How modern indoor life disrupts circadian rhythms and melatonin production
- The surprising statistic about how little time people spend outdoors
- Why lighting design is becoming a pillar of performance in professional sports
- How hospitals are using circadian lighting to improve patient recovery
- Why shift workers struggle with health — and how lighting can help
- The difference between light for sight vs. light for physiology
- Simple ways to improve your lighting environment at home
- Why bright mornings and dim evenings matter more than you think
- How lighting may influence focus, reaction time, and sleep readiness
0:00 Intro to Biocentric Lighting and Sleep
3:45 Meet Kyle Harris of BrainLit
7:15 Light as a Biological Signal vs Visual Aid
11:30 Light as a Pillar of Health and Recovery
16:00 The Modern Indoor Environment Problem
20:15 Understanding Different Light Sources
24:30 Lighting in Hospitals and Surgery Centers
28:45 Feedback from Professional Sports Teams
33:15 Impact on Coaches and Staff Performance
37:00 The Red Light Experiment at Home
41:30 Light Volume vs Light Spectrum
45:45 Measuring Light for Health Outcomes
50:00 Creating an Ideal Light Day for Humans
54:15 Simple Home Lighting Hacks
58:30 Jet Lag Mitigation and Future Tech
1:02:00 Infinite Shelf and Closing Thoughts
Connect with KyleTranscript
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| 0:00.0 | If you don't get the right light stimulation, the right inputs, then your building a melatonin |
| 0:05.0 | or melanophic entrainment is impaired, which means you're not going to sleep and recover well. |
| 0:09.5 | Any humans in a box under a light can be made better, healthier with kind of the natural stuff |
| 0:14.7 | that happens outside, which we're not doing your self-in-part. |
| 0:18.3 | That was Kyle Harris on this week's episode all about biocentric lighting. |
| 0:23.3 | Kyle is the CEO of Brainlit, a company focused on how indoor lighting influences sleep, |
| 0:28.6 | recovery, cognition, and physiological readiness, particularly in high-performance settings. |
| 0:34.0 | And that really sets this up because I want everyone to know that number one, we don't want |
| 0:38.3 | you to worry about your lighting. |
| 0:40.2 | Number two, like put it on the list of things to stress about, right? |
| 0:44.6 | But we did start to see that a lot of serious people were taking interest in how their |
| 0:51.7 | environment was working. |
| 0:53.0 | And we had a friend who was a director of |
| 0:54.7 | performance for a very big sports team. And he had told me about this lighting, hey, we're |
| 1:00.4 | looking at how we could shape the environment to actually meet better needs and have better |
| 1:05.1 | performance. And it turned out it was brainlight. Yeah, and we've had so many experts across |
| 1:10.0 | many fields come on this podcast talking to us about the importance |
| 1:13.3 | of circadian biology. You know, everybody knows that Dr. Huberman has been recommending we go outside and |
| 1:18.7 | look at morning sunlight for a long time. That's like one of his biggest health recommendations. |
| 1:22.9 | And so I think this concept really makes sense to us. And the other thing that we've always been |
| 1:27.2 | fans of is like, how can we make doing the other thing that we've always been fans of is, |
| 1:27.8 | like, how can we make doing the right thing easier? And one of the easiest way, yeah, constrain the |
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