If you've started exploring at-home light therapy, you've probably noticed that LED masks glow in different colors — most often red and blue. They aren't interchangeable: each wavelength is designed to target something different. Here's a clear, honest breakdown so you can choose the right setting for your skin goals.
What red light therapy is designed to do
Red light (typically around 630 nm) sits at the warmer end of the visible spectrum and penetrates a little deeper into the skin. It's the wavelength most associated with anti-aging and radiance goals. Many users find that consistent red light sessions help their skin look smoother, firmer and more even over time. If your main focus is the look of fine lines, dullness or loss of firmness, red light is usually the setting to reach for. You can read more in our guide to the benefits of red light therapy for skin.
What blue light therapy is designed to do
Blue light (around 470 nm) stays closer to the surface of the skin. It's most often associated with blemish-prone and oily skin. Rather than targeting fine lines, blue light is designed to support a clearer-looking, more balanced complexion. If breakouts and excess shine are your main concern, blue light is the setting many people choose.
Red vs blue: a quick comparison
- Red light — warmer wavelength, deeper reach, focused on radiance and the look of firmness and fine lines.
- Blue light — cooler wavelength, surface-level, focused on blemish-prone, oily-looking skin.
- Both — non-UV, gentle, and designed for everyday at-home use.
Can you use both?
Yes — and many at-home devices, including multi-color masks, let you alternate. A common approach is to use blue light when skin feels congested and red light as part of a regular radiance-focused routine. Some people simply rotate colors across the week. There's no single "correct" combination; what matters most is using your device consistently and as directed.
How to use them at home
Whichever color you choose, the basics are the same: start with clean skin, keep sessions to around 10 minutes, and aim for regular use rather than long occasional sessions. Our step-by-step guide to using a LED face mask walks through the full routine, and if you're wondering how frequently to go, see how often you should use a LED face mask.
The bottom line
Red and blue light therapy are designed for different goals: red for radiance and the look of aging, blue for blemish-prone skin. A multi-color device like the LUMÉA Pro LED Face Mask lets you choose the right light for the day — all in a gentle, non-UV, at-home format.
This article is for general information only and is not medical advice. LED light therapy is intended as cosmetic comfort care and is not a substitute for professional treatment. If you have a skin condition or any concerns, consult a qualified healthcare professional.