I have 5 wifi light switches, one has been fitted into two different rooms (moved house) all same make MiHome Energenie they don't need a neutral and can have up to three remote controls, and if you also get a hub can work timed or with PC, Tablet, or Smart Phone, however not been fully successfully.
With single 12W BA22d LED light bulbs all three rooms set up that way worked A1.
With 5W E14 (SES) x 5 and x 8 every so often it will fail, remove power and switch back on and it will work for another few months without problem, they are non dimmable E14 and should use dimmable so that could be problem, but in the main works well.
With 3 x 5W GU10 bulbs started to flicker, swapped bulb with other GU10 and worked OK after that, note flickered again.
With 5 x 3W G9 bulbs would not switch off, had to add a 4 uf capacitor and even then some times we get the lights flickering.
The Energenie MiHome will work with geofencing so it auto turns one when your near to home, never tried setting it up to do that, and a host of IFTTT functions like switching one with poor weather forecast again never tried it, first one I was really impressed with using a 12 W LED hence why bought another 4, however in hind sight better using a table or standard lamp plugged in to a socket, as with sockets there is a neutral so they work A1 with any load.
There are wifi light switches that use a neutral, and I would guess they would work better, but there is no neutral at switches in my house. Also my system needs a hub, some work without a hub.
