Bright white thing above the horizon, it was morphing into different shapes while flashing very bright white & two red lights (fixed)

On Monday night, 17 July 2023 about 1am, I couldn't sleep so went downstairs to get a drink. Looking out of my kitchen window I observed a very single intense white light with two red lights attached to it due east from my house. I would say it was about 5-10 miles away sitting just above the horizon. It was moving across my field of view from right to left at a steady speed.
I got my binoculars and looked at it more closely. It was very weird. The red lights were fixed and not blinking but the white light was dancing on and off, up and down, round and round, sometimes it would partially disappear, only to re-appear dancing and morphing its brightness and shape. I would describe it as looking like 'electrical plasma'. If you can imagine electricity charge similar to lightning trapped in a glass sphere but in this case the object was not rigid, it was deforming its shape and orientation as the electrical white light pulses bounced around the inside.
I watched it travel across the sky towards the town of Moffat and then disappeared from view. I returned to bed puzzled by what I had seen.
I also saw another similar but static electrical object in the sky from my house in June 2023 (when there was a full moon), but didn't report it. I tried to take a photo of the object with my iphone but was unsuccessful.
My house is not far from the listening / radar station at Sanquhar.