Range from the cheapest Downlights installation £240 (Steve Becker Limited based in SN9) to the dearest Downlights installation £440 (Amber Heating Ltd based in SP3).
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 SP3.