Range from the cheapest Downlights installation £240 (Eyes4usecurity based in Ha0) to the dearest Downlights installation £450 (M&E Electrical Contractors Ltd based in UB6).
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 HA9.