Orbs flying around Lake Ontario in Mississauga

My friend called me into the living room and told me that she had seen orbs fly over the tree behind our house. We sat and waited, and soon another orb flew into view and seemed to fly behind behind us. After a few minutes, another appeared from that direction and flew quickly in a wavy way, up and down, back over the housed, and a light in the center seemed to get brighter. This orb was soon followed by three more, one at a time. These moved faster and in formations that I have never seen a plane or helicopter do.This is the first experience I've had where I have absolutely no idea what it was that we saw. I'm unsure of how many there were because they could have doubled back. There were at least four.