These lamps provide all the advantages of conventional T3 quartz infrared lamps and more without the problems. The cold zones at each end of the lamp provide for easy mounting using simple clips or springs. The elimination of the need for bulky modules permits use in confined areas. The internal polished stainless steel reflector never needs cleaning and is protected from dirt and dust. The reflector will not oxidize as it is enveloped in inert gas. All electrical connections are made at one end of the lamp, reducing installation and maintenance costs. Access to the heating chamber is not necessary to service the lamps. Two quartz envelopes are utilized, providing excellent thermal, mechanical, and impact shock resistance. These are the ideal maintenance-free lamps for multiple heating applications. They may be used in many confined areas not suited to conventional T3 lamps.