Range from the cheapest Downlights installation £341 (Gethin Williams Trydanwr Mon Electrical based in LL77) to the dearest Downlights installation £363 (Phil Hynes Electrical Contactors Limited 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 Tyn-y-gongl.