In article ,
John Rumm writes:
Rafal wrote:

fire hoods? what are they?

They are required where you fit recessed lights into a ceiling, which
is required to provide resistance to spread of fire, such as between
flats.

These particular ones might be slight overkill for a domestic situation,

Fire proofing between flats isn't really a domestic situation.

but this should give the general idea:

http://www.tlc-direct.co.uk/Main_Ind...ght/index.html

--
Andrew Gabriel