Great Beds Light is a sparkplug lighthouse in Raritan Bay, about 1 mile (1.6 km) from South Amboy of Middlesex County, New Jersey, United States. Over the years the lighthouse has become the symbol for the city of South Amboy. Named as Great Beds Light Station, it was added to the National Register of Historic Places on May 29, 2008, for its significance in architecture, engineering, transportation, and maritime history.
The light was built in 1880 with a fourth order Fresnel lens to mark the Great Beds Shoal, hazardous shallow water in the Raritan Bay. The 30-foot (9.1 m) foundation, a conical caisson, sits in about 11 feet (3.4 m) of water. The five-story tower and lantern are 47 feet (14 m) high.
