I parked my car just off HWY 301 In Riverview, Florida to call on a client. I happened to look up at the sky (crystal blue, totally cloudless) and spotted what first looked like a flock of white birds or balloons, but in a very strange pattern and moving slowly and all in unison. I had binoculars in the car, and looking through these was amazed to see they were not birds or balloons but yet couldn't comprehend exactly what I was looking at. They appeared to be round white lights with a somewhat reddish tint, with 2 dark, solid triangular fixed appendages on each side. They all looked exactly the same with one or 2 drifting away at times and then a few drifting back in to join the rest. They traveled slowly in a straight path across the sky from a NE to SW direction, all maintaining approximately the same position from each other, keeping the overall pattern of the group fairly consistent. I removed the binoculars for just a few seconds to get my bearings, but when I looked back through them, they were gone. I estimate the total viewing time to be about 5 minutes. Still could not comprehend what I just saw, but realized the sight was similar to what I have seen on the History Channel that was a "fleet" of UFO's seen in Mexico. That is pretty much exactly what this looked like and the best way I can describe it. Thought about this sighting for days trying to rationalize it and convince myself they must have been birds, but the more I thought about it, the more confident I was that they were not.In my opinion, unidentified flying objects for sure.