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Downlight Ceiling Void

Posted: Fri Jun 05, 2009 11:56 am
by mfkev
Hi I want to install two downlights into my lounge ceiling but the void is only 85mm. Most downlights I have seen require 100-110mm void, I live in a flat with concrete floors and there is good ventilation in the void.

Would I be ok to install a downlight that needs a 100mm void or are there lights that only need 80mm?