Assertion: led's output | /r/CapableOf | illuminate area
Facets:
Source sentences:
text: The early red LEDs were bright enough only for use as indicators, as the light output was not enough to illuminate an area.
text: These red LEDs were bright enough only for use as indicators, as the light output was not enough to illuminate an area.
text: These red LEDs were bright enough only for use as indicators, as the light output was not enough to illuminate an area.