Looking up, you can see landing platforms interspersed with the stairs. Above one window is a circular opening that provides access to the hollow walls. I found out from a later trip that this area was used to house the weights that powered the rotation of the lens. The watchroom at the top of the lighthouse is entered via a wooden trap door . The inside of the watchroom is paneled with wood.
Circular portholes provide light to the room during the day.
From the lantern room, you can look up into the lighthouse lens . Here is the view from inside the lens looking back down . The light is illuminated by a single 1,000 watt light in a dual lampchanger . If the primary light burns out, a standby bulb automatically swings into position. When looking out through one of the bulls eye lenses, the horizon is inverted.