Red vs Blue vs Near-Infrared Light: What's the Difference for Skin?

LED skincare devices are usually described by colour: red, blue, sometimes near-infrared and others. Each colour is a different wavelength of light, measured in nanometres (nm). Here is what each one is, what researchers are looking at, and what to check on an at-home device, without the hype.

At a glance

Blue light

Blue light has the shortest wavelength of the three and acts near the skin's surface. It is mainly studied for acne because it affects the bacteria involved in breakouts, and some dermatologists use it in clinic as one option for mild to moderate acne. Results vary from person to person, and home devices are generally less powerful than clinic equipment. It isn't a substitute for acne treatment from a doctor.

Red light

Red light reaches a little deeper. It is the most studied colour for signs of skin ageing such as fine lines and texture. Some small studies report modest improvements, but evidence is still limited and depends heavily on the device, its power and how it was used. Read more in how red light therapy works for skin.

Near-infrared light

Near-infrared is invisible and reaches the deepest. It is studied mainly for wound healing and recovery, and it is often paired with red light in professional devices. Many home masks don't include it, and because you can't see it, you can't tell by looking. Only the documented specifications can confirm it.

Other colours

Some masks add yellow, green, purple or white modes. These are studied far less than red and blue, so treat bold claims about them with caution.

What to check on an at-home device

• Listed wavelengths in nm, not just colour names.
• Session length and frequency in the manual, and whether there is an auto shut-off.
• Eye protection guidance.
• Fit and comfort: a mask you find comfortable is one you'll actually use.

Our Rechargeable Silicone LED Face Mask has multiple selectable light modes. If a specific wavelength matters to you, contact us before ordering and we'll confirm the specifications.

Safety

Check with a doctor first if you take medication that increases light sensitivity, have a light-sensitive condition, a history of skin cancer, or epilepsy (some devices flash). Follow the manual and stop if your skin or eyes feel uncomfortable. See who should avoid LED light therapy.

Frequently asked questions

Can I use red and blue light together?

Many devices offer combined modes. Follow your manual for timing and frequency.

Which colour should I start with?

Choose based on your main concern and the modes your device lists, and follow its instructions. For persistent skin problems, see a dermatologist first.

Does a red-looking light include near-infrared?

Not necessarily. Near-infrared is invisible, so check the device's specifications.