Regular Outdoor Motion Sensor Flood Light + Zwave Switch?

Also, one other option if you really like those floodlights and you really want to add control of the switch is to use a “robot finger.“ That way it doesn’t affect the wiring at all.

These do work, I use a couple at my own house, but the aesthetics aren’t great. I use them because I’m quadriparetic and they solve some button pushing issues that I don’t have any other good way of solving. (Like the eject button on an old DVD player which otherwise I like a lot. People also use them to retcon window air conditioners and things like that.)

Anyway, I just mention them for completeness since they would be another alternative to smarten up your existing dumb switches. The integration with smartthings is through IFTTT.

2019 Switchbot Review ( robot button pusher), integration through IFTTT