Range from the cheapest Downlights installation £290 (Heyworth Electrical based in IG3) to the dearest Downlights installation £390 (Gusttydo Ltd based in RM10).
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 RM10.