At 7:25 pm on 9-27-2016 I looked out my window to see 5 bright lights floating over lake Michigan. specifically in front of the south street beach area of evanston, Illinois. They were initially in a linear formation and then moved to a t formation. Three of the orbs slowly broke away to form a triangle. After 30 minutes the orbs disappeared. A delivery driver coming to my home also saw the lights. There were planes flying past these lights. I have photos and video.