Range from the cheapest Downlights installation £313 (MM Engineering Services Ltd based in BD4) to the dearest Downlights installation £340 (SAS Electricals based in BD3).
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 D1.