Assertion: lamp's filament | /r/HasProperty | sealed with compact transparent envelop
Facets:
Source sentences:
text: A halogen lamp consists of a tungsten filament, which is sealed with a compact transparent envelop and filled with an inert gas and small amount of halogen (bromine or iodine).
text: A halogen lamp, also known as a tungsten halogen, quartz-halogen or quartz iodine lamp, is an incandescent lamp consisting of a tungsten filament sealed into a compact transparent envelope that is filled with a mixture of an inert gas and a small amount of a halogen such as iodine or bromine.