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Complete Guide
Light is the most underrated wellness tool. It sets your circadian rhythm, powers your mitochondria, regulates your hormones, and heals your tissues. This guide covers the science of using light strategically — and avoiding the light that harms you.
4
Light Types
5
Daily Windows
3
Protocol Levels
5,000+
PBM Studies
6
FAQs
The Spectrum
Not all light is created equal. Each wavelength affects your body differently. Understanding the spectrum is the first step to using light strategically.
Full spectrum (380–700+ nm)
Triggers melanopsin receptors in the retina, setting the suprachiasmatic nucleus (master clock). Suppresses melatonin, elevates cortisol and dopamine at the right time.
Protocol: 10–30 min within 1 hour of waking. No sunglasses. Cloudy days still work (10x indoor light). Face the sun but don't stare directly at it.
Huberman Lab / Salk Institute circadian biology research
630–670 nm (red) + 810–850 nm (near-infrared)
Photons absorbed by cytochrome c oxidase in mitochondria, enhancing ATP production by 40–50%. Reduces oxidative stress and inflammation at the cellular level.
Protocol: 10–20 min per area, 6–12 inches from device. 3–5 sessions per week. Most effective post-workout or in the evening.
Ferraresi et al., 2012 — European Journal of Applied Physiology
810–850 nm (invisible)
Penetrates deeper than red light (up to 3 inches into tissue). Reaches muscle, bone, and brain tissue. Stimulates mitochondrial function and reduces neuroinflammation.
Protocol: Same session as red light — most panels combine both wavelengths. Position device over target area (joints, muscles, or head for cognitive benefits).
Hamblin, 2016 — BBA Clinical
400–490 nm
Strongly activates melanopsin receptors. Beneficial in the morning for alertness, but devastating to melatonin production when exposure occurs after sunset.
Protocol: AVOID after 8 PM. Use blue-blocking glasses (amber/red lenses) after sunset. Enable Night Shift / f.lux on all screens. Use warm/dim lighting in the evening.
Chang et al., 2015 — PNAS
Circadian Rhythm
Your body expects different light at different times. This schedule shows the optimal light exposure pattern for peak performance and deep sleep.
6–8 AM
Sets circadian clock, cortisol awakening response
10,000+ lux (outdoor) vs 500 lux (indoor)
8 AM–12 PM
Peak alertness and cognitive performance window
1,000–10,000 lux
12–4 PM
Maintains alertness, second cortisol peak
1,000+ lux ideal
4–8 PM
Signals transition to evening, cortisol declining
Outdoor evening light is ideal
8 PM–sleep
Melatonin production begins. Blue light delays onset by 90 min.
<50 lux, amber/red spectrum only
Want This Personalized?
This guide gives you the science. A CryoCove coach gives you the personalization — the right dose, timing, and integration with your other 8 pillars.
Protocols
Start at Foundation — it's free and requires no equipment. Progress as you build habits and invest in devices.
FAQ
Light therapy is just one of 9 pillars. CryoCove coaching integrates sunlight timing, red light therapy, and circadian optimization with your sleep, nutrition, and training protocols.