The Theradome uses only 678 nm wavelength. It claims to stimulate the mitochondria similar to what the research says. At $900, it is a lot pricier for the convenience of a put it on and wear it device. It also says it only penetrates 3-5 mm. The TBI research used systems that penetrated up to 3 cm (30 mm). I'm not impressed with the manufacturers hype over laser vs LED technology. Wave length is wave length. Wattage is wattage. Laser vs LED does not make much difference.