We had a tower with light in my town. We're right on the Pacific coast to the tower was inland and behind a hill so it couldn't be mistaken for a lighthouse by passing ships.
The tower and shed are still there and are used for communication antennas.
Lighthouses are regularly used for navigation, so they need to have almost guaranteed up-time. Don't think that would always be the case for these particular kinds of lights.
The tower and shed are still there and are used for communication antennas.