I am not familiar with the operation of those specific bulbs, so I will stay in my lane. The STL360 is just a relay output, so no harm in using little or no load. It could easily feed a ZBMINI or ZEN51 to tell your hub that motion was sensed.
This is partly why I am not a fan of devices that try to do multiple things. It seems that you will have multiple sensors and multiple relays in order to control smart bulbs. But, I also understand the desire to tweak an existing setup.
