You can see a demo of this lighthouse here: (https://www.youtube.com/watch?v=EwKKhQQBnFE) This version uses the auxiliary lens instead of the VRB-25 lens. The Graves Lighthouse is a privately-owned, solar-powered, offshore granite lighthouse with a black lantern room and elevated walkway located off the coast of Boston, Massachusetts, United States, just two miles north of the Boston Lighthouse. The lighthouse is made of granite blocks that lock together like a jigsaw puzzle. This design was perfected at the Bell Rock Lighthouse in Scotland, and ever since, has been the choice of design for many offshore lighthouses, save for some in Florida and the Chesapeake Bay, which use a different technique. The lighthouse was constructed in 1903, automated in 1976 and converted to solar power in 2001 by request of the current owner who purchased the lighthouse at auction from the US Coast Guard. An electric undersea cable that ran from Hull, MA used to supply the power until the solar conversion. At night, the lighthouse flashes twice every 12 seconds, using a VRB-25 lens. It rotates 24-7, but the light only comes on at night. Mounted on the ceiling in the lantern room is an auxiliary light. In foggy weather, the foghorn blasts twice every 20 seconds.
The owner of this lighthouse is being sued by the town of Hull, MA, which claims the lighthouse and land it sits on is owned by them, and that the private owner owes them back taxes. The owner disagrees, saying the lighthouse wasn't listed as being located in any town, but the town insists they have old maps claiming the lighthouse is located in Hull, MA.