Current Display
The lighthouse is fitted with three 90-watt Osram Halostar lights with a range of 17 nautical miles (31 km; 20 mi). These will be replaced by two 150-watt lights with a range of 24 nautical miles (44 km; 28 mi) by the end of 2012, in preparation for the closure of Orfordness lighthouse in 2015.
The current light characteristic is four white flashes every 20 seconds (Fl(4).W.20s) visible between 220°–001°, with two red sectors with the same characteristics. These are seen from the south between 204°–220° and from the north between 001°–032.3°, with a range of 15 nautical miles (28 km; 17 mi). The white light is used for general navigation, whilst the red sectors mark shoals to the north and offshore sandbanks at Sizewell to the south.
Read more about this topic: Southwold Lighthouse
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