Weekly Photo Challenge: Nighttime

This week theme.

SONY DSC

Eiffel Tower by night. The beacon, sending out two light beams with a reach of 80 kilometres, is composed of 4 “marine” motorised projectors. They are operated by automatically piloted computer programs. Since their rotation sweep is 90°, they are synchronised to form a double beam in a cross that pivots around 360°.

Paris, Eiffel Tower

copyright-2014

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