Red light and infrared saunas both utilise light at different wavelengths to promote health benefits. Red light therapy uses visible red light (630-660 nm). These wavelengths of light are beneficial in improving energy, cellular health, muscle recovery and performance. On the other hand Infrared saunas use near, mid and far infrared lights, which are outside the visible spectrum, to generate heat. Infrared light penetrates the skin more deeply than red light, reaching muscles and tissues, and creating a heating effect. This deep heat promotes sweating and increased circulation without significantly raising the ambient temperature of the sauna.