Assertion: tungsten's number | /r/CapableOf | indicate the diameter of the tube
Facets:
value: in eighths of an inch
type: OTHER
Source sentences:
text: Many such lamps have designations that begin with the letter "T" to indicate that they are "tubular" followed by a number indicating the diameter of the tube in eighths of an inch: a T3 bulb, then is a tubular halogen bulb that is 3/8ths of an inch in diameter[Note 1]