Red light therapy

We look for

• Measured output: irradiance (mW/cm²) at a stated distance, averaged over a stated area and measured with a spectroradiometer, ideally by an independent lab. Solar power meters can read two or more times high.
• Wavelengths the research uses: red around 630 to 670 nm and near-infrared around 810 to 850 nm, stated for the LEDs.
• Regulatory status stated honestly: an FDA 510(k) clearance for a named use is stronger than a registration. Most panels are registered under a code exempt from 510(k), so “FDA Class II” means registered, not cleared.
• Low flicker and eye safety: a flicker measurement, not just a “flicker-free” claim, and eye protection included or recommended.
• A real warranty: at least a year, from a maker you can reach, with the same terms wherever it is sold.

We avoid

• Irradiance figures with no measuring method or distance.
• Claims to treat disease, burn fat or regrow hair, unless the device is cleared for that use.
• “FDA approved” wording on a device that is only registered.
• Makers that also sell EMF-blocking or “harmonizing” products.

Read the research

• How red light therapy works
• Benefits and practical usage
• Photobiomodulation: Skin, Muscle Recovery, and Brain Support