Lamba is an uninhabited island in Yell Sound in Shetland. It lies 1.5 km (0.93 mi) north of the entrance to the Sullom Voe inlet and 1.4 kilometres (0.87 mi) east of the Mainland coastline near Ollaberry. Rising 35 metres above sea level, it has an area of 43 hectares (0.17 sq mi). Its main features are a 27m high light marking the entrance to Sullom Voe,[5] and an adjacent communications mast.