Range from the cheapest Downlights installation £240 (Mike Harries Electrical based in EX39) to the dearest Downlights installation £357 (EMS South West based in EX39).
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 EX33.