You also ignore the corroboration by the civilians in the area, who saw nothing like a lighthouse beam, and who were familiar with conditions in the area.
I have a strange image of you being dragged aboard an alien spacecraft like that guy in the "To Serve Man" episode of "The Twilight Zone" screaming "But I thought it was just a lighthouse"! LOL!
Have to go. Keep watching the skies (just kidding)!
None reported any sightings that night. Only after the story came out did they step forward to make a claim to have seen something.