Range from the cheapest Downlights installation £260 (A1 Electrical Professional Services Ltd based in NN4) to the dearest Downlights installation £410 (Electrician based in NN7).
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 NN7.