Range from the cheapest Downlights installation £250 (Handyhome Services based in IP21) to the dearest Downlights installation £405 (JSF Electrical Services Ltd based in NR10).
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 Trowse.