The guided tour (note that you can't visit on your own) will teach you the whole story of the lighthouse, which is quite entertaining, since this lighthouse is very old and a lot has happened to it during the years. While you climb the 115 steps to the top, the tour will also show you the various rooms the lighthouse has, explaining what they were used for. Yet unfortunately, these are mainly empty rooms that don't have much to see.
Of course, the real attraction here is the top balcony, where a wonderful view of the surroundings awaits you, provided that the weather is good enough. Unfortunately, they won't allow you to spend more than a couple of minutes here, so you will have to rush watching around and taking pictures.
So, while the visit was enjoyable, I was actually expecting a bit more. Maybe some small exhibitions could be setup in the rooms, so that they have something more to offer, and some more free time on the top balcony could be allowed.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.