Stangholmen lighthouse

Stangholmen Lighthouse (Norwegian: Stangholmen fyrstasjon) is a coastal lighthouse in Risør Municipality in Agder county, Norway. The lighthouse marks the channel from the Skagerrak, through several islands to the mainland town of Risør which sits at the end of a peninsula between the Søndeledfjorden and the Sandnesfjorden. The lighthouse was first built in 1855 and in 1959, a new, automated light was constructed which is still in use to this day. The light is located on the small island of Stangholmen. It is only accessible by boat. The site is open to the public but the buildings are not. The white, cylindrical concrete tower has a red roof on top. The 8.5-metre (28 ft) tall tower sits at an elevation of 9 metres (30 ft) above sea level. The light emits a white, red, or green light (depending on direction) occulting once every 6 seconds. The red light can be seen for up to 2.1 nautical miles (3.9 km; 2.4 mi), the green light can be seen for up to 1.9 nautical miles (3.5 km; 2.2 mi), and the white light can be seen for up to 3.3 nautical miles (6.1 km; 3.8 mi). Each light can only be seen from certain directions.