Light therapy is one of the oldest traditional healing methods. Even before complex medical knowledge developed, people simply laid their sick in the sun.
Light and Color as part of light are an electromagnetic frequency, thus energy. This energy unfolds its effect on the body by its being absorbed via the eyes, the outer layers of the skin, the tissue and the cranial bones.
Substances in the hormones in our blood transform the light impulses received by the spectrum of visible (infrared) and invisible (ultraviolet) light and transport them to every single cell of the body.