Assertion: arc lamp | /r/AtLocation | followspot
Facets:
Source sentences:
text: Arc lamps were superseded by filament lamps in most roles, remaining in only certain niche applications such as cinema projection, followspots, and searchlights.
text: Arc lamps were superseded by filament lamps in most roles, remaining in only certain niche applications such as cinema projection, followspots, and searchlights.