Again;
Maybe they weren’t just lights. Maybe sensors of some sort?
Doc, let it be said from someone who was a T&E (Test & Evaluation) specialist at Ft. Huachuca’s USAEPG, you have no inkling of what “toys” we have that are tested at night specifically because of the reasons I stated.
All I can say is that at this point in time you have no idea and neither do I, but I have the experience to have an inkling.