Range from the cheapest Downlights installation £270 (Mullings Electrical Ltd based in SN10) to the dearest Downlights installation £470 (C & S Services IMC Limited based in OX12).
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 SN25.