RSSI is just signal strength. Tracking it allows you to approximately triangulate where people are so you can say "ID #xxxx was closest to the first floor east stairwell at 10:02am". Maybe nothing is done with that data, but it's ultimately a surveillance system and enables all the potential abuses that can entail.
I know what RSSI is, it seems like complete nonsense even pretending this is for energy efficiency if you have to keep track of where the non-staff are anyway - or is the people-tracking just an optional extra?
I think people tracking was just an optional extra/add-on. It sounds like the RSSI signal was there in the first place to set up the mesh based on what other lights had active sensors...
