Bob, I haven't forgotten about your Jaws 2 entry. I have been looking for it. One was Edgartown. I went through reams of narrative at one site (a critique by some movie buff) which claimed to address the lighthouse location - no luck. There was a small picture of a light - not Edgartown - so I am trying to find which one it is. Thanks for your post.

Note: Apparently it is Gay Head; the shot was taken at such an angle that I didn't recognize it.