Range from the cheapest installation of smart lighting £54 (Dingers Electrics Ltd based in W7) to the dearest installation of smart lighting £174 (ThePlumbers.org based in TW7).
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 TW8 by posting a job with HaMuch and we will send it to electricians in TW8.