We, too, have seen them hovering over the lake. When we lived at Lomas del Manglar our house was at the top of the hill facing the lake. We saw them hovering on a couple of occasions, just hovering, red lights surrounding the object, totally silent. They hovered for awhile and then just quickly moved to the left and totally disappeared in a flash, again, totally silent. It was an amazing sight. I wrote about them on this board several years ago, guess whatever, whoever, they are, they are still there.