3 lights hovering in air forming triangle shape, turned vertically and separately descended to ground

In car, riding back home. Saw 3 lights hovering in air, that formed a triangle shape. The lights were very bright and flickering. All the lights disappeared for a few seconds, and just one light reappeared. Over a few seconds all the 3 lights reappeared but began to separate further. The lights then formed a vertical line, with each light descending to the ground at separate times with a visual tail. Very odd, neither myself or husband have ever witnessed anything of this sort.