Range from the cheapest Downlights installation £250 (Patrick Graham Hutchings based in SY25) to the dearest Downlights installation £294 (D J Dudley Electrical Contracting based in SA48).
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 Tregaron.