What do you guys think of UFO's?

[Ghieri]

But who would create an aircraft triangular in shape, perfectly
camoflauged by the night sky, that generates no noticable sound, with
three giant lights (i.e. taking up about 25% to 30% of space each) on
the bottom of the aircraft?

I think lights are standard issue for aircraft, even stealth fighters. If they were on then the craft was probably not on a military mission.