From one to many

Yvette Mattern, 'From one to many' (2010)
A giant straight laser powered rainbow appeared in the nightly sky above Berlin at Futurity Now, last year at Transmediale.10 (2 - 6 february 2010).
The colorful beams started fairly low at the 'Haus Der Kulturen Der Welt' in the 'Tiergarten' and three kilometers further, ending high at the 'Fernsehturm' (TV tower) at the 'Alexanderplatz'.

see also: solargraph