LED masks are sold on one number and judged on another.
The number on the box is the LED count. It is the easiest thing to increase and the least useful thing to know. The number that decides whether a mask does anything is irradiance, measured in milliwatts per square centimetre, and most brands never print it.
That matters more here than in most categories, because the research on red light therapy is done with laboratory devices at known outputs. A mask that looks identical but delivers a fraction of the light is not a cheaper version of the same treatment. It is a different thing in the same shape.
So this is a guide to checking, not a list of bargains. There are two masks at the end that we list, and two we looked at and decided not to.
The only spec that decides it
Three figures matter, and they are related.
Wavelength, in nanometres, determines what the light can do. The best-studied are red around 630nm and near-infrared around 830nm. A mask that will not tell you its wavelengths is telling you something.
Irradiance, in mW/cm², is how much light actually reaches skin. This is the figure that separates a device operating in the range the research uses from one that is mostly a novelty.
Dose, in joules per square centimetre, is irradiance multiplied by time. Studies on skin rejuvenation span roughly 1.2 to 126 J/cm², which is a wide range, and where a device sits in it depends on both its output and how long you wear it.
Here is the part worth carrying around: a premium mask is not dramatically brighter than a good mid-priced one. An Omnilux Contour publishes about 30mW/cm² at 633nm and 830nm, and costs $395. That is the benchmark the expensive end is built on, and it is a number a £145 mask can match.
Who has actually tested these
Two independent sources are worth more than every brand claim combined.
The consumer group Which? tested ten LED masks using 3D facial scans before and after six weeks of use, with a dermatologist analysing the results. That is the closest thing to a controlled comparison a UK buyer can read.
Lab Muffin, written by a cosmetic chemist, publishes per-mode irradiance figures rather than repeating manufacturer copy. Her numbers for the Ulike below are lower than that brand's own marketing, which is exactly why they are the ones to trust.
Note what is not on that list: customer reviews. A mask that feels nice and looks impressive tells you nothing about its output, and star ratings cannot measure light.
The two we list
Ulike ReGlow LED Face Mask: £144.49
The best documented mask we could find at this price, and the reason is not the specification sheet but who checked it.
Wavelengths: red 630nm, near-infrared 830nm, blue 465nm, yellow 590nm.
Irradiance: 20mW/cm² in Glow mode and 40mW/cm² in Firm mode, per Lab Muffin's published figures. Ulike's own marketing says up to 100mW/cm². We are quoting the chemist, not the brand.
Clearance: an FDA 510(k), cleared as substantially equivalent to existing devices for full face wrinkles and mild to moderate inflammatory acne. That is a specific, checkable claim rather than a general wellness gesture.
Worth knowing: the studies showing a 14% increase in skin gloss and 9% improvement in elasticity at 28 days were commissioned by Ulike. That does not make them wrong. It does mean they are not independent, and we would rather say so.
Verdict: In the same irradiance band as a $395 Omnilux, at £144.49, with someone credible having checked. If you buy one mask from this page, this is it.
Nanoleaf LED Face Mask: £126
Made by a lighting company rather than a beauty brand, which is a point in its favour on the engineering and makes the omission below stranger.
What we can tell you: seven modes across red, near-infrared, blue, green and yellow, and 432 diodes arranged as 108 LEDs of four each.
What we cannot: Nanoleaf does not publish an irradiance figure. We checked their own product page and there are no wavelengths, no power density and no dose. Third-party reviewers report around 91.9mW/cm², but that is roughly three times both the Ulike's measured output and the Omnilux's published one, and the sites reporting it are affiliate operations. We would not build a purchase on it.
Verdict: Cheaper, from a serious manufacturer, and genuinely less well documented than the Ulike. A reasonable buy if the price difference matters, with clear eyes about what is unverified.
What each one publishes
| Wavelengths | Irradiance | Independent check | Price | |
|---|---|---|---|---|
| Ulike ReGlow | 630, 830, 465, 590nm | 20 to 40mW/cm² | Lab Muffin, FDA 510(k) | £144.49 |
| Nanoleaf | Red, NIR, blue, green, yellow | Not published | None found | £126 |
| Omnilux Contour | 633 and 830nm | About 30mW/cm² | Published by brand | $395 |
| CurrentBody Series 2 | Red, NIR, deep NIR | Not published | Widely reviewed | £299.99 to £455.99 |
The third column is the one to read. Price does not track it: the most expensive mask in the table does not publish an irradiance figure, and the second cheapest has had its measured by a chemist.
The two we decided against
ZoneCraft, around £170. Publishes modes, battery life and a zoned-treatment design, but no wavelengths and no irradiance. The most detailed source about it is a company press release, which is not a source.
A £29 mask we will not name as a recommendation. It exists, it is in the same shop as everything above, and it has no published specification and no review anywhere we could find. At that price the honest position is that nobody, including us, can tell you what it emits. We are not listing it, and a site that sells cheap alternatives declining to sell the cheapest one is the most useful thing we can say about it.
Frequently asked
Do LED masks work at all? Reviews of the clinical literature support red and blue light for acne and for skin rejuvenation, using devices at known outputs. The gap between that research and a consumer mask is dose, which is why the top of this page is about irradiance rather than results.
Is more LEDs better? No. LED count is the cheapest number to raise and says nothing about output per square centimetre, which is what reaches skin. Two masks with the same diode count can differ several times over in irradiance.
How often would I need to use one? The Ulike's protocol is three sessions a week at five to sixteen minutes depending on mode. Consistency is the part people underestimate: an unused mask has an irradiance of zero regardless of what it cost.
Is the FDA clearance meaningful in the UK? It is not a UK approval, and it is a clearance rather than an endorsement: a 510(k) means a device is substantially equivalent to one already on the market for the stated use. It is still more than most masks in this price range have.
Should I just buy the expensive one? Not on the numbers here. A $395 Omnilux publishes about 30mW/cm², which the Ulike matches in Firm mode at a fraction of the price. If you want the premium brand for other reasons that is your call, but the light is not obviously the reason.
How we chose these
Our own prices are read live from the retailer as this page loads, so they are current rather than whatever they were when this was written.
Every technical figure above is attributed to whoever published it, and where a brand and an independent source disagree we have used the independent one and said so. That is the case for the Ulike, where the marketing claims up to 100mW/cm² and the measured per-mode figures are 20 and 40.
We have not measured any of these ourselves, and we have no way to. That is precisely why the page is organised around who has, and why two products that are perfectly easy to sell are not listed on it.
The bottom line
Check for a wavelength and an irradiance figure before anything else. If a brand will not print them, no LED count makes up for it.
On that test the Ulike is the pick, because it is in the same output band as a mask costing several times more and someone qualified has verified it. The Nanoleaf is the cheaper option with the honest caveat attached.
More of what we track for skin is under Beauty & Skincare. The same question, of what the expensive version actually gives you, runs through our Crème de la Mer comparison and our niacinamide moisturiser guide.