Actually it does behave a little weird. If I use the wall switch to change the state of the light, say turn it off, the A+ doesn't seem to realize this. It still displays as on at 99%. To turn the light on via the app, I have to turn it off (which does nothing, as the light is already off) and then on again. Same issue with changing the brightness of the light with the wall switch. The change is not reflected in the app.