Range from the cheapest Downlights installation £250 (Cader Electric based in LL40) to the dearest Downlights installation £335 (J R Electrical based in LL49).
Comparing electricians estimates for Downlights installation gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes for installing downlights by posting a job to electricians in Dyffryn Ardudwy.