therapy which purports to provide "deeper" penetration. Since the infrared radiation of an object is determined by its temperature, all heating pads provide the same infrared radiation if they are at the same temperature. Higher temperatures will provide greater infrared radiation but the user must be careful to avoid burns. References External links Far infrared radiation (FIR): its biological effects and medical applications Challenging a Myth and Misconception: Red-Light Vision in Rats Infrared