660 nm, 850 nm and why a panel pairs them. A plain guide to photobiomodulation at home.
Red light therapy — photobiomodulation, if you want the formal name — uses specific wavelengths of red and near-infrared light. Red sits around 630–660 nm and you can see it. Near-infrared, around 810–850 nm, is invisible and travels a little further into tissue.
Why two kinds of light
Studies have looked at red light mostly for skin and near-infrared for muscle recovery and joints. A panel that carries both lets you cover the whole body in one short session.
Dose matters more than time
Irradiance — how much light reaches you, in mW/cm² — sets how long a session needs to be. With a bright, well-measured panel, ten minutes at 15–30 cm is usually enough. More is not better; consistency is.
Three to five short sessions a week beat one long one.
Home Longevity devices are wellness products. They are not intended to diagnose, treat, cure or prevent any disease. Speak to your doctor before starting if you are pregnant or have a medical condition.
