Three silent orange blinking lights in triangle formation.

My husband and I formally from Washington state, we’re fishing at the Indian town bridge in Jupiter Florida. I looked up in the sky and noticed three warm/orange lights. They were in a perfect triangle formation. They were blinking on and off, and we’re sweeping eerily across the sky in unison without a sound. Completely silent in their movement. No sound of any motor, or buzzing. Just silent like the stars. The lights appeared to be a lot closer then the airplanes around the area, but way too far away and bright to be a drone. The movement of the lights were too synchronized to be drones. The moment I noticed them, I pointed it out to my husband and another fellow fisherman, who was fishing near us. We all saw the same thing. The moment we all saw the lights they started to get very dim. Until you could only see two of the lights. The third bottom light making the bottom of the triangle completely disappeared by the time I tried to take any footage or photos. The triangle formation disappeared before they went behind the bridge. I ran across the street to see if I could see it past the bridge, in the direction it was going, and it was completely gone, like it had never been in the sky.