The Point Cabrillo Lighthouse complex is located about 1.5 miles (2.4 km) north of Mendocino, California, and includes the lighthouse itself together with several outbuildings. Most of the original structures remain, but the barn is missing: in 1986 it was destroyed in a fire department exercise. The remaining lighthouse station is "one of the most complete light stations in the United States". Atop the lighthouse spins a third order Fresnel lens with four panels containing 90 lead glass prisms and weighing 6800 pounds, constructed by Chance Brothers, an English company, and shipped to Point Cabrillo around Cape Horn. The light is only 32 feet (9.8 m) above the ground, but because of the height of the headlands it stands 81 feet (25 m) above sea level. It was originally lit by a kerosene lamp and turned by a clockwork mechanism but this was replaced by an electric light and motor in 1935. The present light uses a single 1000-watt electric filament, the light from which is magnified by a factor of one thousand by the lens, and spins once every 40 seconds producing a flash every 10 seconds.