Light artists were able to create new exhibition spaces collectively in the form of light art festivals. These festivals have continued to grow internationally and help to highlight ecological change. This LED low energy movement dates back to the 2009 by the Vivid Smart Light Festival in Sydney.[19] In Singapore, the i Light Marina Bay festival—Asia's only sustainable light festival—was first hosted in 2010.[20] There are many light art festivals, especially in Europe, including the Signal Festival in Prague and the Ghent Light Festival.