|Lighthouse Ar Men in 2011|
|Location||Off Île de Sein, Brittany, France|
|Year first constructed||1867|
|Year first lit||1881|
|Height||32 m (105 ft)|
|Focal height||37 m (121 ft)|
|Range||23.5 nautical miles (43.5 km)|
|Characteristic||3 Fl W 20s|
Ar Men is one of the best known lighthouses because of its isolated situation and the considerable difficulties its construction has presented, and the danger in evacuating its personnel. Considered as one of the most challenging workplaces by the community of lighthouse keepers, it has been named "The Hell of Hells".
The light was automated and electrified on 10 April 1990 with a 250 watt halogen lamp. Its signal is three white flashes every twenty seconds, with an accompanying signal of three sounds every sixty seconds.