Excellent shot... lovely textures in the body of the lighthouse, with all that rust. Dramatic sky, as a backdrop, too. Your once-a-month shot is a cracker.
Haha...glad to hear your obsession is under control, but I think I would have the same problem if I lived anywhere near the sea (it's a 4+ hour trip for me to get there). I love lighthouses....something about them intrigues me :) Wonderful shot