Range from the cheapest Downlights installation £350 (Archteckbuild based in SE12) to the dearest Downlights installation £363 (Maciej Dziadkowiec based in SE9).
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 Grove Park.