Assertion: sodium lamp | /r/HasAspect | an arc tube
Facets:
value: under 100 to 200 torr pressure
type: OTHER
Source sentences:
text: For example, a high pressure sodium lamp has an arc tube under 100 to 200 torr pressure, about 14% to 28% of atmospheric pressure; some automotive HID headlamps have up to 50 bar or fifty times atmospheric pressure.