The Wavelengths of Near Infrared Light Therapy

Infrared light immediately follows red light on the electromagnetic spectrum.  Infrared (IR) light energy is broken down into three groups:

Near Infrared,  also called infrared A (IR-A).  Near IR spans wavelengths 760 to 1,400 nm.  Most home therapy devices use these wavelengths.

Mid Infrared, also called infrared B (IR-B) – These wavelengths are used in many household electronic devices such as remote controls.

Far Infrared,  or IR-C– also known as long wave infrared , thermal infrared (thermal-IR).  This is the largest part of the IR spectrum, used in infrared saunas.