London ON - September 10th 10pm

I was looking out the window speaking on the telephone this evening when I heard what sounded like a plane. As I looked up out of the window to see it, I saw a triangle shaped aircraft or something? flying across my range of vision travelling in a south-easterly direction. Although it was quite fast, I have never seen an aircraft with triangular lighting? To the best of my recollection, the craft had red, blue and yellow lights on it and none were flashing. I am a bit of a UFO buff, and realize that most of these triangular shaped craft are silent but this was not?? Im not sure what to make of it but thought I should report it. Maybe someone else saw it as well?