Assertion: lamp's bulb | /r/HasProperty | opaque
Facets:
value: as with the ultraviolet output
type: OTHER
value: at these frequencies
type: TEMPORAL
value: largely
type: DEGREE
Source sentences:
text: As with the ultraviolet output, the glass outer bulb is largely opaque at these frequencies and thus for this purpose needs to be removed (or omitted in purpose-made lamps).[citation needed]