Assertion: mantle | /r/CapableOf | give off bright light
Facets:
value: very
type: DEGREE
Source sentences:
text: When the mantle (a small cylindrical hood, which—when placed over a flame—becomes white hot and gives off very bright light) was incorporated into the design of gas, kerosene, and oil lamps about 100 years ago, the light intensity of such devices jumped from about 15 watts to nearly 60.