What is an LED face mask?

An LED face mask is a wearable device that holds an array of LEDs at a fixed distance from the face, so the whole area receives light at once without you holding anything in place.

That is the entire proposition of the format: consistency and hands-free coverage. A handheld device can be more precise; a mask is more repeatable.

Rigid versus flexible

Rigid masks hold a fixed shape and keep a consistent distance between the LEDs and the skin. They tend to feel more substantial and are usually worn sitting or reclined.

Flexible masks use silicone or similar materials to sit against the contours of the face. They are generally more comfortable to move around in, and the light sits closer to the skin.

Neither format is inherently superior. Fit matters more than category — a mask that does not sit well on your face is a mask you will stop using.

Reading the specification sheet

• Wavelengths in nanometres, listed individually rather than as 'red and infrared'.
• The number of LEDs, which tells you about coverage density rather than strength.
• Irradiance, which describes how much light energy reaches a given area — and is the figure most often omitted.
• Session length and recommended frequency as set by the manufacturer.
• Power source: mains, rechargeable battery, or a controller pack.

Comfort details that decide whether you use it

Weight and strap design matter more than most specification sheets suggest. So does whether the eye openings work for you, whether the mask can be cleaned easily, and whether the controller is intuitive enough to use half-asleep.

A device only does anything if it becomes part of a routine. Judge it on that basis as much as on its numbers.

A note on claims

Be sceptical of any mask sold with percentage improvement figures, before-and-after imagery of unknown provenance, or claims to treat medical conditions. Where a manufacturer has genuine substantiation, it can be shown and checked.