The box says
“648 LED lights for full-face coverage”
A count, not a dose
LED count is marketing. Measured irradiance is the light that actually reaches your skin. We compare independent spectrometer readings, session time, and each product’s real FDA 510(k) record.
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#1 by measured irradiance: Omnilux Contour Face (26.7 mW/cm²). Highest-ranked mask on Amazon US that passes our seller check: #3, the Therabody TheraFace Mask (19.4 mW/cm²).
Therabody TheraFace Mask on Amazon ↗Not linked on Amazon, each at its own latest check: #1 Omnilux Contour Face (no available Amazon listing, checked 9 November 2026) and #2 HigherDOSE Red Light Face Mask (sold by a third-party seller, checked 19 October 2026).
Exact listing B0CNHTST52: featured offer sold by the brand's own store (TheraGun) at our 9 November 2026 check. Prices and stock change; the listing is authoritative.
Showing … red / near-infrared LED masks · higher measured irradiance is better · measurements from the cited spectrometer reviews · no prices listed
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| # | Mask | Irradiance | LEDs | FDA | Session | Shop |
|---|---|---|---|---|---|---|
| 1 | 633 + 830 nm | 26.7 mW/cm² | 132 | Cleared | 10 min | Omnilux ↗unpaid link |
| 2 | 630 + 830 nm | 26.0 mW/cm² | 132 | Cleared | 10 min | Third-party seller (2026-10-19) |
| 3 | 633 + 830 nm (+ 415 nm blue) | 19.4 mW/cm² | 648 | Cleared | 9 min | Amazon ↗ |
| 4 | 633 + 830 + 1072 nm | 18.5 mW/cm² | 236 | Cleared | 10 min | Third-party seller (2026-11-09) |
| 5 | 605 + 630 + 660 + 880 nm (+ 415 nm blue) | 8.0 mW/cm² | — | Cleared | 3 min | Amazon ↗ |
Measured figures come from Light Therapy Insiders’ spectrometer tests (Alex Fergus — one tester, one instrument, measured at the mask surface; the review behind each number is linked on its row). We run no tests ourselves; full credit and protocol in the method. Where a review prints dose per session, the mW/cm² shown is that dose over its measured window — arithmetic, not a new measurement; hover a number for the working. LEDs is the marketing count, shown muted because it is a count, not a dose — note the 648-LED mask ranks third, and the mask advertising 70 mW/cm² metered 5–11. FDA = a real 510(k) behind the claim; whose paper it is — brand or OEM — is the line under each name, and the clearance record is the full audit. No cited measurement, no rank. Stock and sellers change; the linked listing is authoritative. Some links are affiliate links; they never change a ranking. As an Amazon Associate we earn from qualifying purchases.
Four things per mask — the measured ones cited to the independent spectrometer review that produced them, the published ones traced to the brand’s own page or the FDA’s database. We run no tests ourselves and publish no measurement without a citation.
Power density at the skin in mW/cm², from a cited spectrometer test at the mask surface — the dose over the mask’s own session. Higher is better — and it ranks the table. Why this number ›
The brand’s own headline — “648 LEDs,” “70 mW/cm²” — quoted exactly and shown muted beside the measurement. The label never ranks anything.
Every “FDA cleared” claim is matched to its real 510(k), K-number and clearance holder. See every 510(k) number on one page, or browse the face-mask record, hair-cap register, or Normatec record.
Minutes per session as designed. We list no prices: each link opens the current listing. Stronger output usually means a shorter session — which is what you’ll actually stick with.
These masks have real 510(k) paper behind their claims (each name links the sourced answer), but no measurement under the cited protocol — and numbers metered under different protocols at different distances don’t share a ruler. They sit here, unranked, until a citable figure exists. The claims we couldn’t match to the record at all — including two “7-colour” Amazon listings and one dermatologist-brand mask — are below the line in the audit.
The ranking tells you how much light reaches your skin. The clearance record tells you whose FDA paper each “cleared” claim actually rides — and the guides answer it brand by brand.