Assertion: black light bulb | /r/HasProperty | inefficient
Facets:
value: exceptionally
type: DEGREE
value: at producing uv light
type: TRANSITIVE-OBJECT
Source sentences:
text: Although incandescent black light bulbs are a cheaper alternative to fluorescent tubes, they are exceptionally inefficient at producing UV light since most of the light emitted by the filament is visible light which must be blocked.