Light therapy is the application of light energy for therapeutic purposes. When colors are perceived, what the eye is detecting is bands of wavelengths (measured by nanometers, nm) within the region of visible light of electromagnetic spectrum. Humans can see visible light from violet (about 400nm) through to red (about 700nm). Below 400nm the light is invisible ultraviolet light and over 700nm is invisible infrared light.

Different wavelengths of light within the visible spectrum can have different effects on the skin:

- Red LED light has been shown to rejuvenate the skin, diminishing the appearance of fine lines and wrinkles.

- Blue LED light has been proven to kill P.acnes bacteria, helping to cure existing blemishes and prevent further outbreaks.