Range from the cheapest Downlights installation £307 (Greens Electrical Services Ltd based in CF36) to the dearest Downlights installation £350 (Scorpian Electrical Services based in CF33).
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 Porth.