"1964 (station established 1886). Active; focal plane 10 m (33 ft);
quick-flashing red light. 10 m (33 ft) round cylindrical concrete
tower with lantern and gallery. Lighthouse painted white with one
red horizontal band under the gallery. A walkway leads to a 1-story
wood keeper's house; the house is painted red with white trim. ... This is an important light, because ships approaching Göteborg
make a turn to the north as they pass this point. Located on a small
island about 400 m (1/4 mi) north of the island of Brännö.
Accessible only by boat. Site open, tower closed."
If you look at the Google image, you can see that is important, with the ship wakes passing by.