Works to erect a lighthouse on the island began in 1846 but funds were sufficient only to excavate the foundations.
The light was fitted with an incandescent kerosene mantle in 1917 and upgraded in 1935, with mains power provided by a diesel generator and the 1,000 watt halogen lamp producing an intensity of 900,000 candela.
The focal plane of the light is situated at 55 metres (180 ft) above sea level and the characteristic is a group of three flashes every twenty seconds.
A keeper's house is occupied by a caretaker; another building may be rented for overnight stays.
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