Range from the cheapest Downlights installation £353 (Wentworth Security Solutions based in HP1) to the dearest Downlights installation £630 (MLB Electrical Contractors Ltd based in HP1).
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 P1.