I use object detection on a camera. Works perfectly for spotting a person (eg. me or the missus) in the living room and keeps the lights on accordingly.
I've found the best practice is not to use cameras for motion detection initially because camera motion can be triggered by all sorts of things that are not necessarily/really motion (eg. light levels changing, shadows, sunshine etc). But with object tracking it works great as a virtual motion sensor to cancel the delay in a lighting timeout.
I also use Withings sleep pads for the bedroom. These are relatively good at sensing presence in the bed and hence can control lighting, HSM activation etc. It works pretty good.
