Studies show that light-emitting diodes (LEDs) like those designed into the Horizon II Infrared and Red Light Therapy Unit, stimulate the basic energy processes in the mitochondria (energy compartments) of each cell. Evidence indicates that cells absorb photons and transform their energy into adenosine triphosphate (ATP), the form of energy that cells utilize. The resulting ATP powers metabolic processes and synthesizes DNA, RNA, proteins, enzymes, and other products needed to repair or regenerate cellular components. In short, light therapy facilitates and stimulates the healing process.