Iunno. I don't have many theories about what the lights even represent, honestly. Some of the others have lost them and they still seem fine, right? Not soulless zombies or anything. So people can still be people after losing their lights, but anomalies seem to think they can't become people without one...?

[ The shrug is pretty much audible. ]

The first anomaly I ever encountered killed someone and then kinda spoke inside my head. It was repeatedly asking where the thing it was looking for was, so maybe they can't see the lights the way we could when we were monsters?