How we test and rank LED face masks

This page explains exactly how we assess and rank LED face masks — including, importantly, what our scores are not. Read it before you trust our ranking. If our method doesn’t convince you, our conclusions shouldn’t either.

Why bother, then? Because the single biggest problem in this category isn’t missing lab gear — it’s that buyers can’t tell a genuinely certified, well-dosed medical device from a CE-marked gadget with a long colour list and no disclosed numbers. Sorting that out rigorously and transparently is genuinely useful, and almost nobody does it without an affiliate agenda.

#The rubric

Every mask is scored out of 10 on six weighted dimensions. The weights reflect what the evidence says actually determines whether a mask can work — clinical support and delivered dose matter more than LED count or brand.

#What we assess, in detail

1. Clinical evidence

We separate independent, peer-reviewed research from manufacturer-funded studies, and we downgrade brands that cite “clinically proven” with nothing citable. We reward devices whose specific wavelengths and doses match what the literature actually supports. Where the best evidence is cautious — as it is for blue light and acne — we say so.

2. Wavelengths and dose

We check that wavelengths are stated in nanometres and fall in the evidenced bands (≈630–660 nm red, ≈830–850 nm near-infrared, ≈415 nm blue), and we reward brands that disclose real irradiance or per-session dose. A device that hides its numbers loses points, because — as our dose guide explains — the delivered dose is what decides results.

3. Certification integrity

We verify certification claims and, crucially, whether the marketing matches them: a self-declared CE mark is not the same as an EU MDR Class IIa medical device with a Notified Body number, and an FDA clearance is not an FDA approval. We explain the distinctions in our certification guide, and we penalise brands that blur them.

4. Coverage, fit and comfort

Because irradiance falls with the square of distance, fit is not cosmetic — a flexible mask that sits flush delivers close to its rated dose, while a rigid shell can leave under-treated “dead zones”. We assess conformity, coverage of the whole face, and whether a mask is comfortable enough to use consistently, which is what ultimately produces results.

5. Safety design

We look at eye-protection design (especially for blue light), thermal behaviour, and whether the brand provides clear contraindication guidance. Our full safety guide sets out the medical caveats in detail.

6. Value and ownership

We consider price per session over a realistic 3–5 year life, warranty length (we treat one year as the floor and two as a good sign), build quality and battery longevity — not just the sticker price.

#How the score is calculated

The headline score is the weighted average of the six dimension scores. For example, a mask scoring 9 on evidence, 8 on wavelengths, 9.5 on certification, 9 on fit, 8.5 on safety and 9.5 on value earns roughly 9.0 overall. We publish all six sub-scores on each review so you can weight them for your own priorities — someone treating acne should care more about wavelengths than someone chasing value.

#What we deliberately don’t do

• We don’t accept payment, product-for-coverage deals, or any consideration for placement or ranking. Ever. See our independence page.
• We don’t claim to have lab-measured irradiance. Where we quote a figure, it is the manufacturer’s, and we say so.
• We don’t present manufacturer-funded studies as independent proof.
• We don’t use before/after images supplied by brands as evidence.
• We don’t make medical claims. LED masks may help modestly; they don’t cure skin conditions.

#Keeping it current — and correcting mistakes

Specs, prices and certifications change. Every ranking and review carries a “last updated” date, and we revisit the ranking when devices launch, change or are re-certified. If you spot an error — a wrong spec, an out-of-date price, a certification we’ve misread — tell us at our contact page and we’ll fix it and log the correction. Getting it right matters more to us than being first.