juno makes an ICAT recessed light.
Insulation Contact Air Tight
make sure that the light is not one of
the ones that is air tight when used with the
following trims...these will set you back about
$15.00 per light.
Invest instead in ICAT..about $15.00 more per box of 6.

beware of just reading the sticker inside as the red sticker says air tite in large letters and when used with
in much smaller letters.
Orange air tite stickers are ICAT.

with other brands, physically remove one of the cans from the box..if the housing that goes into the attic has no
holes, it is air tight.

best of luck.