Range from the cheapest Downlights installation £340 (Azura Networks based in OX28) to the dearest Downlights installation £345 (Future Power Solutions Ltd based in OX29).
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 Eynsham.