600 Pulse-width modulated LEDs (originally fibreglass table lamps) in 200 silicon containers (originally yo-yos).
Some more images about the 1:1 model in Budapest.
In Venice we covered the floor with vateline that made steps very soft. Brave barefoot visitors and curious kids will find it very pleasant!
The light of the lillies is controlled by an Arduino chip designed by Massimo Banzi. The controlling program can be downloaded as arduino code or as pdf, also containing code colours.