I recently fitted some Iguzzini recessed downlighters in my first floor
bathroom.
Having had problems with wasps in the loft above, I wondered whether there
were any proprietary covers for the above-ceiling portion of the light.

You can get some sort of fire-proof cone that goes behind them - they`ve
been mentioned several times recently if you do a quick google, these
might do what you want as well as improving the safety :-}

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