Every red light device is different. Wavelength, intensity, coverage and session length vary from model to model, and a claim on a product page is not the same thing as a measurement. The way to choose well is to insist on information you can check.
Three things to look at, and how they relate
Wavelength tells you where the light sits, not how good it is
A wavelength figure places the light in the spectrum. On its own it says nothing about quality. It only means something read alongside intensity, distance and time.
Intensity and time work together, not separately
How much light you receive depends on intensity and duration at once. That is why a schedule written for one device does not transfer to another. Use the manual for the model in front of you.
A routine beats a long session
Following the instructions consistently matters more than stretching any single session. If you feel discomfort, burning, or anything unusual, stop and speak to a qualified professional.
What we will and will not publish
- We publish a figure only once we have checked it against product documentation or testing.
- We state the measurement conditions — distance from the source, for instance — wherever they change what a figure means.
- We keep usage guidance separate from specifications, so neither gets read as the other.
- Where something is unconfirmed, we say so rather than filling the gap with an estimate.
That last point is why parts of our specification tables currently read “not confirmed”. It is deliberate, not an oversight.
What this page is not
This is buying guidance. It is not medical advice and it diagnoses nothing. If you have a medical condition, are sensitive to light, take medication that increases light sensitivity, are pregnant, or have any concern about your eyes or skin, talk to a qualified professional before using a device.