Red Light vs Near-Infrared Light: 630nm, 660nm, 810nm, 830nm, 850nm & 940nm
When comparing red light therapy wavelengths, numbers such as 630 nm, 660 nm, 810 nm, 830 nm, 850 nm and 940 nm appear frequently. These numbers describe wavelength in nanometres and indicate where the light sits within the visible red or near-infrared spectrum.
Why wavelength matters
Different wavelengths are absorbed and scattered differently by tissue. That is one reason research protocols and commercial devices often use more than one wavelength. But wavelength should not be evaluated in isolation: power density, distance, duration and treatment area also affect the delivered dose.
630 nm and 633 nm
These are visible red wavelengths frequently used in photobiomodulation research and consumer devices. They are often selected for applications involving superficial tissue and skin-oriented routines.
660 nm
660 nm is one of the most common visible red wavelengths in red light therapy panels. It is widely paired with near-infrared wavelengths such as 850 nm in dual-wavelength devices.
The Recover Body LUM-400A, for example, combines 660 nm and 850 nm in a compact panel.
810 nm and 830 nm
These wavelengths sit in the near-infrared range. A systematic review of brain photobiomodulation devices found that wavelengths around 810 nm were among the most commonly used in the studies it reviewed, although protocols varied considerably.
The Recover Body face mask combines 630 nm and 830 nm, giving a visible-red plus near-infrared configuration in a wearable format.
850 nm
850 nm is one of the most widely used near-infrared wavelengths in commercial red light therapy equipment. It is commonly paired with 660 nm and is found in both compact devices and larger systems.
940 nm
940 nm is a longer near-infrared wavelength included in some multi-wavelength professional devices. Its presence does not make a system automatically superior; the overall optical design and treatment protocol remain important.
Are more wavelengths always better?
No. A device with five wavelengths is not automatically better than one with two. The best configuration depends on the application. A compact targeted panel can be intentionally simple, while a professional full-body system may use a broader wavelength mix.
How to choose
When comparing products, look at the full specification rather than just the wavelength list:
- wavelength combination;
- LED count and layout;
- irradiance or output information where available;
- treatment area;
- recommended distance;
- session controls and timer;
- device size and intended environment.
See all Recover Body Red Light Therapy Panels and Red Light Therapy Beds to compare different configurations.
This article is educational and does not replace medical advice.