Photon light is part of the light spectrum at a wavelength of 660 nanometers. It is known to provide positive skin healing effects. Your mat may come with the photon lights indicated by the red circular LEDs. The photon lights should make contact with your bare skin. For best results use a thin cover that allows some light to go through or optionally use the mat uncovered. You can use the photon lights for 20 minutes or as long as you want.