The bright light over the Newlyn Art Gallery on 30/7/11 at 23:56.
It was moving from left to right, it stayed the same brightness with no flashing, and it moved steadily.
It is incredible that some folk think that we are still alone. I've seen many examples like this in Penzance but never managed to get any on camera.
Also those lights I saw also defied the laws of physics.... So less likely to beman made.