What Is Red Light Therapy and How Does It Work?

March 5, 2026

Red light therapy has become increasingly popular in recent years as a convenient wellness technology used in homes, gyms, and wellness clinics.

But many people still wonder: what exactly is red light therapy and how does it work?

What Is Red Light Therapy?

Red light therapy uses specific wavelengths of light, typically around 630–660 nanometers, to deliver gentle light energy to the skin.

Some devices also use near-infrared light (around 850 nanometers), which can penetrate deeper into tissues.

These wavelengths are commonly used in modern wellness devices designed for relaxation and comfort.

Red light therapy devices contain LED panels that emit controlled light wavelengths.

When used regularly, the light energy interacts with skin and muscle tissue, creating a warming and relaxing sensation.

Many people incorporate red light therapy into their wellness routines to support recovery and relaxation.

Several factors have contributed to its growing popularity.

Many red light therapy devices are designed for home use.

Red light therapy is a non-invasive technology that does not require needles or medication.

Most devices are wearable or portable, making them easy to incorporate into daily routines.