Commons seen from the top of the Ouistreham lighthouse. August 2014.
Ouistreham. Turn of the 20th century lighthouse. August 2014. Little Lighthouse is a title by Dukes of Stratosphear aka XTC, a British new wave rock band of the 1980s.
The whole Fresnel lens complete with iridescence. Detailed view of the Fresnel lens (pronounce "FrAYneLLE"), named after Augustin Fresnel (strangely re-baptised on the English version of Wikipedia), who is said to have invented the first lighthouse lens in 1823, 190 years ago to the day. National maritime museum, Paris, 2013.