In article , writes
IMM wrote:

Is the requirement to stop them getting hot?? they are designed to go
into enclosed spaces not just open lofts so I don't think heat build up
around the lamps is a problem, the requirement is to keep materials away
from the lamp so an upturned clay pot is a good solution, I did this to
mine years ago without problem.

Well the original subject is "Preventing halogen lights overheating
under Rockwool". The loft insulation is hardly going to suffer from
the heat of the lamp so what good is the plant pot doing?

It is keeping an air space around the lamp and the insulation away from the
lamp too.

It may give you "warm feelings" (ha, ha!) but I fail to see what good
it's done for anything.

The lamp will probably run hotter as it's in a very enclosed space
with no ventilation.

This is what I was trying to say in my first reply, does it matter if it
runs hotter in an enclosed space? I don't think so

The insulation won't care either way as it's decidedly not
inflammable.

The one thing it *might* do is protect adjacent joists from the heat of
the lamp but I'm not all that convinced that "no flowerpot" will make
the joist any warmer than "flowerpot" will.

The idea of a 'chimney' of some sort (i.e. a largeish tin with both
ends cut off) seema a much more sensible approach to me.

If you are into insulation and draught proofing though, you have created
a hole in your ceiling unless you use the sealed lens type units, by
putting a pot over and sealing around the edge you prevent this
--
David