Clump of stationary lights, changed shape as drove by.

Coming down New York State Thruway I-87 South, I saw a clump of about 15-20 bright lights no more than 100’ off the ground. Created a rugged circle/octagon shape, size of a typical aircraft. At first I thought it was a low flying plane, however, it never moved as I got closer. When I drove by the lights, they no longer were in a circular clump. The lights formed more of a rectangular shape and there was about half as many as I saw from a distance. They were bright white lights. No color to them. When I drove by, I could almost see the shadow of the object. Looked irregular shaped.