Science guide · 6 min read
How Do Red and Near-Infrared Light Work?
A plain-language guide to wavelengths, measurement, and responsible product evaluation.
Answer in brief
Red and near-infrared light devices use LEDs to deliver selected wavelengths. The most useful way to compare devices is to separate wavelength design from measured output, then evaluate irradiance at a stated distance, coverage, session guidance, and independent evidence.
Start with wavelength
Wavelength is measured in nanometers. Visible red and near-infrared light occupy different parts of the spectrum and should be reported separately.
- — Look for exact wavelengths
- — Ask whether values are design targets or measured peaks
- — Avoid unspecified 'full spectrum' claims
Output needs context
Power consumption is not the same as light delivered to the body. Useful reports state irradiance, distance, measurement method, and coverage.
Evidence before claims
Scientific research can inform product design, but a study on one setup does not automatically validate every consumer device. Verified product data should come before marketing claims.
