The Vielight 655 emits low level laser light with a 655 nm wavelength. The light pulses continuously with a power density of 5 mw/cm2.
The laser beam footprint targets the nasal cavity, which is rich in blood capillaries. The device parameters have been derived from researching clinical studies on low level light therapy over the last few decades. Although many researchers now believe that the outcomes between low level laser and the non-laser light emitting diodes (LED) to be similar, the laser light should penetrate deeper into the tissues.