Range from the cheapest Downlights installation £290 (Brian Sykes Electrician based in RH15) to the dearest Downlights installation £380 (Fixers-Uk Ltd based in BN1).
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 RH15.