Rick Spencer, at Mystic Seaport, wrote and sings "The Lighthouse Keeper's Daughter," on his CD with Susan Jerome (title track).
Dave Littlefield, also of Mystic, wrote and sings "Keeper of the Light" on his CD "Far From the Shore."
The Ancient Mariners do "Faulkner's Light" on their album which might be eponymic, I don't have it around to check.
Jimmy Crowley of Cork has a wonderful song long out of print but soon to be back on CD about the passing of the manned lights, and how the computer can't grieve for the soul it fails to save. He blessed me with a private rendition of it once that is damaged but might be usable to retrieve/recreate it if CD is not ready; I will check his site.