South Stack Lighthouse

South Stack Lighthouse
South Stack Lighthouse in 2012
LocationHoly Island, Anglesey, Wales
Coordinates53°18′24″N 4°41′58″W / 53.30667°N 4.69944°W / 53.30667; -4.69944
Tower
Constructed1809
Constructionstone tower
Automated1983
Height28 m (92 ft)
Shapetapered cylindrical tower with balcony and lantern
Markingswhite tower and lantern
OperatorTrinity House
HeritageGrade II listed building, National Monument of Wales Edit this on Wikidata
Fog signalone 3s. blast every 30s. (range of 2 nmi (3.7 km; 2.3 mi))
Light
Focal height60 m (200 ft)
Lens1st order six panel catadioptric rotating
Intensity467,000 candela
Range24 nmi (44 km; 28 mi)
CharacteristicFl W 10s.

The South Stack Lighthouse is built on the summit of a small island off the north-west coast of Holy Island, Anglesey, Wales. It was built in 1809 to warn ships of the dangerous rocks below.

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