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Calculators/Wavelength selector
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660nm or 850nm?

The answer depends on depth. 660nm absorbs in skin and scalp. 850nm penetrates to muscle, joint, and brain. Most goals want a mix.

Pick your primary goal. We’ll show the wavelength split, effective penetration depth, and the right Hale panel format. All RLPRO panels ship with an 8-band spectrum — the split is about how you weight your dose, not which panel you buy.

660nm and 850nm light beams crossing through a translucent cross-section showing penetration depth
Wavelength selector
Recommended wavelength mix
70% · 660nm
30% · 850nm
660nm — surface, skin, hair850nm — muscle, joint, brain

660nm primarily drives fibroblast activation. 850nm penetrates deeper dermis for combined effect — a 70/30 split is the literature consensus for cosmetic protocols.

Effective penetration for your goal: 0.5–2 cm.

All Hale RLPRO panels deliver 8-band coverage (630/650/660/670/810/830/850/1060 nm) — so the split is about which band you weight your dose toward, not which panel you buy.

Recommended panel
RLPRO 1000
Delivery format
Mask or panel — your call
Spectrum strategy
Balanced mix
Effective depth
0.5–2 cm
Deep dive — what we cite

Email me a personalized report

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Sample output
Goal-keyed split chart: surface goals anchored to 660nm, depth goals to 850nm

Deploying RLT into a clinic?

We’ll walk through panel selection, the wavelength evidence behind each indication you treat, and how to add red light therapy to your room workflow with clear pricing and patient education.

View clinic deployment