Home LED face masks are everywhere again for christmas presents, and I’m not mad about it. When they’re good, they’re one of the most evidence-backed “do-it-at-home” devices we have in aesthetics.

But here’s the part that makes most viral posts a bit… incomplete:

Wavelength matters, yes. But your results are usually decided by the “dose” your skin actually receives — and that comes down to irradiance (power density), fit, and treatment time.

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