Light

L'Agulhas - Cape of Needles, and was named by the Portuguese navigator Bartholomew Dias in 1488.
Light Type Revolving electric
Light Character One flash every 5 seconds
Light Range 30 sea miles
Light Power 7 500 000 CD
Height of focal Plane 31 metres above high water

The Cape St Blaize lighthouse was erected in 1864. And up until recently, was one of the only two lighthouses manned 24 hours daily on the South African Coastline
Light Type Automatic lamp-exchanger
Light Character Group flashing, showing two flashes every 15 seconds
Light Range 22 sea miles
Light Power 450 000 CD
Height of focal Plane 0 metres above high water


A Fresnel lens (pronounced [freɪ'nel]) is a type of lens invented by French physicist Augustin-Jean Fresnel. Originally developed for lighthouses, the design enables the construction of lenses of large aperture and short focal length without the weight and volume of material which would be required in conventional lens design. Compared to earlier lenses, the Fresnel lens is much thinner, thus passing more light and allowing lighthouses to be visible over much longer distances