Does the physical wall switch needs to be constantly on?

Yeelight LED Bulb (Color)
#1

So I just received my yeelight v2 bulbs and they are great!
My question is if there will be any problems when I leave the wall switch constantly on, and turning the yeelights on/off using the app. Will my elecktricity bill increase???

Thanks in advance!

#2

There should not be any problem in keeping the wall switch, if you switch off then communication will be lost. Regarding electricity yes there should be some minimal watts.

#3

Ok, good to know!