Range from the cheapest Downlights installation £210 (JMG Repairs & Electrical Installations based in DY3) to the dearest Downlights installation £410 (RJM Multi Trade based in DY2).
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 WS10.