The 660 nm wavelength of red light has been proven to speed up the healing of the skin, injuries, inflammation, collagen production. The 850 nm of near infra-red light helps with regeneration of tendons, bones and muscles repair. The body needs red light. It’s like vitamin D. We are deprived of it because we are sheltered from the sun all the time. Overexposure of the sun is a problem. The isolated spectrum gives you a boost to get the extra zip that you need. It speeds up the ATP production of the cells.