Seen some of these, similar, in my area this last year. Has like a bright blue light on them. From what I’ve been told they some sort of “triangulation target system”..for finding vehicles in certain situations. Like Amber alerts kinda deal. The ones I’ve seen don’t spread to far and wide, only line in a certain area. So it does kinda seem like it’s used for what they are saying it’s for. Otherwise they would be everywhere. But I don’t know. I’m sure they are being used for a lot more than what’s being said.