Range from the cheapest Downlights installation £290 (T J Electrics based in LL60) to the dearest Downlights installation £363 (AJH Electrical Contractor based in LL61).
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 Llanfairpwll.