The fire-rated recessed downlight includes a mantle, and a light fixture
which is fixed in the mantle, said mantle having at least one radiating
hole, in which a dilatable fireproof piece is fixed. The radiating hole
is connected with outside of the mantle through a radiating aperture. The
radiating hole of the mantle and the dilatable fireproof piece could help
to radiate the heat in ordinary situations and the dilatable fireproof
piece will expand rapidly to close the radiating hole when on fire,
therefore the fire inside the mantle will not spread to the outside.