Range from the cheapest Downlights installation £105 (Emergency Electrician near Carshalton FREE VISIT URGENTLY based in SM5) to the dearest Downlights installation £490 (Down To Earth Electrical Contractors Ltd based in SM1).
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 SM1.