Range from the cheapest Downlights installation £363 (London City Electrical Ltd based in SW19) to the dearest Downlights installation £375 (Southern Counties Services Ltd based in SW19).
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 Wimbledon.