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Trafalgar Fountains. Trafalgar Square - a state of the art LED system marks latest stage of the square's redevelopment, with the installation of an innovative 'green' energy lighting system. As well as saving thousands of pounds a year in running costs, the state of the art lighting will enable the fountains to be lit up in different colours to tie in with major events. London, UK. (KEYSTONE/CAMERA PRESS/ED/CM)