Infrared heat lamps emit between 2 and 25 micrometers of radiation. The precise amount of radiation emitted by an infrared heat lamp depends on whether it emits near, middle or far radiation and how pure the emission is.
Infrared heat lamps are incandescent bulbs that produce infrared radiation. Near-infrared heat lamps generate radiant heat that can penetrate up to 8 centimeters beneath the skin, while far-infrared lamps penetrate up to four centimeters. They are often used in banks and industries. Infrared heat lamps are also used in saunas, bathrooms, and to cook or brown food. Some medical therapies use infrared heat lamps to focus healing energy on a specific body part, most often for pain relief.