Assertion: tritium | /r/ObjectUse | used as light source
Facets:
value: in flares
type: TEMPORAL
value: commercially
type: MANNER
Source sentences:
text: Tritium is used commercially as a light source in flares, emergency lights, exit signs and luminous dials (watches and clocks); tritium is also an essential fuel for experimental nuclear “fusion” and has been used for nuclear weapons production.