Range from the cheapest Downlights installation £270 (High Tech Heating Ltd based in IG5) to the dearest Downlights installation £490 (Volt Master Electrical based in RM6).
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 IG7.