Assertion: led | /r/HasProperty | indicator
Facets:
value: for lighting
type: PURPOSE
value: in view of their long lifespan
type: CAUSE
Source sentences:
text: In view of their long lifespan, LEDs are considered as reliable light sources, both as indicators and for lighting, but their lifespan as well as other factors like failures and the MTBF need to be considered when using them in any design.