Range from the cheapest installation of smart lighting £74 (Gsi-Gas based in SE5) to the dearest installation of smart lighting £184 (Haler Electrical based in SE1).
Comparing electricians estimates for upgrading to smart lighting 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 to install smart lighting in SE1 by posting a job with HaMuch and we will send it to electricians in SE1.