We have CFLS in downlighters....had to buy the surround, openback fitting and bulb seperately, was a little dearer than the set.
I really wanted these and just got very cheap white surrounds so they blend into the ceiling.
The light was a bit dim at first but does increase over time or maybe we have just gotten used to not having a glaringly bright house.
Got all of these in a good electrical wholesalers in Limerick and loads of advice from the lads there too.
These will apparently take LEDs also.
best of luck....