Tvistein Lighthouse (Norwegian: Tvistein fyr) is a coastal lighthouse in Larvik Municipality in Vestfold county, Norway. The lighthouse is located on the island of Tvistein, about to the southeast of the village of Nevlunghavn, near the entrance to the Langesundsfjorden.[1] It was first lit in 1908, and was automated in 1988.[2] [3]