~520–590nm
Yellow and green are the frequencies of growth and renewal — the wavelengths of chlorophyll, of sunlight at its most visible, of the nervous system finding its equilibrium. Operating in the mid-spectrum, they activate cell receptors that few other wavelengths reach, supporting mood, skin, digestion and the body's capacity to regulate itself.
GREEN LIGHT
Primary characteristics
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Mid-energy wavelength
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Moderate penetration
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Strong interaction with the nervous system
Biological relevance
Green light is increasingly studied for its effects on:
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Nervous system regulation
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Pain perception
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Autonomic balance
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Sensory processing
Emerging research suggests green wavelengths may modulate neural excitability and influence vascular tone.
In simple terms:
Green light tends to “calm without suppressing” — stabilising rather than stimulating.
YELLOW LIGHT
Primary characteristics
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Transitional wavelength between green and red
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Moderate penetration
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High interaction with lymphatic and circulatory pathways
Biological relevance
Yellow light is associated with:
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Lymphatic movement
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Tissue drainage
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Circulatory support
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Subtle immune signalling
It occupies a biologically interesting middle ground — neither superficial nor deeply penetrating, but systemically communicative.
In simple terms:
Yellow light supports flow — of fluids, signals, and recovery processes.
Benefits
Stimulates serotonin and mood regulation · Reduces skin redness, rosacea and hyperpigmentation · Supports lymphatic and liver function · Promotes mid-dermal collagen synthesis · Calms nervous system hyperactivity · Supports gut and digestive health
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