Range from the cheapest Downlights installation £352 (GC Electrics based in AL3) to the dearest Downlights installation £363 (Brennan Electrical based in AL1).
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 St Alban.