Editing Heating element (section)

=== Radiative elements ===
Radiative heating elements (heat lamps) are high-powered [[incandescent lamp]]s that run at less than maximum power to radiate mostly [[infrared]] instead of visible light. These are usually found in [[radiant heating|radiant space heaters]] and food warmers, taking either a long, tubular form or an ''R40'' reflector-lamp form. The reflector lamp style is often tinted red to minimize the visible light produced; the tubular form comes in different formats:

* Gold-coated{{dash}} HeLeN quartz infrared heat lamps as originally patented and manufactured by Philips. A gold [[dichroic]] film is deposited on the inside that reduces the visible light and allows most of the short and medium wave infrared through. These tubular quartz lamps are designed for services other than illumination.{{#tag:ref|Philips Lamp Specification & Application Guide 2004, pp. 116|name="philips"}}
* Ruby-coated{{dash}}Same function as the gold-coated lamps, but at a fraction of the cost. The visible glare is much higher than the gold variant.
* Clear{{dash}}No coating and mainly used in production processes.