Assertion: arc lamp | /r/HasProperty | obsolete
Facets:
value: for most of these purposes
type: PURPOSE
Source sentences:
text: The carbon arc lamp is now obsolete for most of these purposes, but it is still used as a source of high intensity ultraviolet light.
text: The carbon arc lamp is now obsolete for most of these purposes, but it is still used as a source of high intensity ultraviolet light.