High-powered heat sources incorporate a tungsten filament within a quartz envelope.
Halogen type, which avoids blackening of tube and consequently infrared depreciation during Lifetime.
Coated to reduce visible glare, improving color rendering and raising infrared output compared to existing Zone heating lamps.
Substantially lower visible glare level than even ruby and neutral density zone heating lamps.
Narrower diameter (cf. Ruby sleeve) for better optical systems and better color rendering and less red color Appearance than ruby sleeve.
Infrared Helen glare reduction lamps comply fully with the IEC standards.