They could be birds, with 1000 watt light bulbs strapped to their backs.
I've seen an "orb" myself. It was an extremely bright light, much brighter than aircraft lights and many times brighter than Venus. The object was
initially motionless but the light seemed aimed at me in a beam, which is why it caught my attention. Since it was about 4AM I thought it might be a
satellite in geostationary orbit and sunlight from over the horizon had just hit it. That thought didn't last long because after a while it started
to move. It's hard to gauge distance at night but unless it was a lot closer than it seemed it must have been traveling at a phenomenal speed, then
it just faded out and disappeared. Was dead silent at that time of day/night too and I didn't hear any noises.
Though I'm now an atheist, I read a fair amount of the Bible in my youth, and I couldn't help but think about the star of Bethlehem. Some UFO
researchers even speculate the Book of Ezekiel is the first recorded alien abduction. If I lived 2000+ years ago and had no concept of modern
technology, I wonder how I would have recorded such events. One of the arguments debunkers frequently make is there were no reports of UFOs in the
1800's. In fact, you can find reports of "mysterious airships" from that era. Hot air balloons and similar dirigibles were the only frame of
reference people of that time had. Even earlier sightings were described as "wheels in the sky" and the like. You have to put these things in the
context of their time.