I'm afraid my knowledge of lighthouses is very limited. I just like to see them in person and photos.
I'll check with my son-in-law. He's more into them than me and he might be able to answer your question. May take a few days though.
Thanks for finding out this info for me. I like visiting lighthouses too. When we went to Nantucket we could see Sankaty Lighthouse from where we were staying. The light would shine in our bedroom window and one morning it was foggy and we could hear the fog horn. There was something peaceful and relaxing about it.