For millions of years, human biology was tuned under one consistent condition: daily, full-spectrum sunlight.

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Today, most of us spend 90% of our time indoors-under dim, artificial lighting leading to ‘light malnutrition’. And the downstream cost is high: disrupted sleep, misaligned circadian rhythms, hormonal imbalance, and impaired metabolic function. 

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Every Wavelength Has a Job

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Think of light as language. Your body listens and responds differently depending on the wavelength it receives. Here’s a breakdown of how each light type functions as a biological signal:

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🔵 Blue Light (450–495nm)

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• Morning stimulant

• Cuts melatonin, raises cortisol, resets circadian rhythm

• Essential in AM, harmful in PM
  
  
  

🔴 Red Light (620–750nm)

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• Mitochondrial booster

• Enhances ATP production, collagen, circulation

• Great for muscle recovery, joint pain, wound healing
  
  
  

🟠 Amber/Yellow Light (570–590nm)

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• Skin-soothing & circulation-enhancing

• Reduces inflammation, improves healing, calms the nervous system
  
  
  

⚡ UVB (280–315nm)

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• Vitamin D synthesis + nitric oxide boost

• Short exposure (5–15 min) is powerful (but must be timed right)
  
  
  

🌡️ Infrared (>750nm)

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• Deep-body activation

• Penetrates muscles and joints, stimulates detox, reduces inflammation

• Found in near-IR (NIR) devices or infrared saunas
  
  
  

The Resolute Protocol: Light Like You Mean It

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Level 1 — Free For All

1. Morning Sunlight (within 30 to 60 minutes of waking): Lock your circadian clock. Sleep better. Focus more. Mood lifts.

2. Midday Break (10 to 20 minutes): Get UVB exposure for vitamin D and nitric oxide.

3. Evening Light Hygiene: Switch to amber/warm lights post-sunset. Avoid screens or use filters (Flux, Night Shift).
   
   
   

Level 2 ― Low-Cost Tools

• Blue-blocking glasses (PM only)

• Filament/amber lamps

• Red/NIR light therapy devices

• Infrared sauna (15–20 min, 3–4x/week)
  
  
  

Personalise Your Light Diet Based on Your Goals

Ground Before You Grow

Light is a primary driver for optimised biology. And it’s free. Yet, almost no one is using it intentionally.

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At Resolute, we consider light a foundational input - a base-layer in your health stack that must be optimised before chasing longevity or elite performance.

Once it is in place, the next steps become clearer: tuning sleep, metabolism, cognition, recovery - not in isolation, but as part of a system that adapts to you.