Range from the cheapest Downlights installation £240 (M S Electricals based in HD1) to the dearest Downlights installation £365 (M A Electrical based in HD4).
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 HD5.