Range from the cheapest Downlights installation £313 (Simon Shepherd based in CH60) to the dearest Downlights installation £329 (G R Bradshaw Ltd based in CH64).
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 Ch33.