I understand your logic, but, here's mine. In Endangered Lighthouses, there is this photo, which it says is a photo of the Prices Creek light

Notice how it is much shorter in that picture, however, it might not be of Prices Creek and Endangered Lighthouses might have a picture of one of the other range lights. But, there is also a very noticible line in which the slope of the tower and brick changes

The other thing, if the top was replaced, why does the pole remain? and if it held the optic in the center of the lantern room, why is it located in the center-front of the tower instead of the direct center?