For two nights only, on the evenings of February 11th and 12th from 5:59PM to 10:30PM, the Yaletown Business Improvement Association will host illuminate Yaletown – a community wide collection of contemporary light-art installations.  The highly anticipated, second annual, free winter street party will feature over twenty-four new, never-before-seen light-based design installations, including a three-storey “twitterfall,” visual sound clouds, and a number of interactive new media displays.  During the evenings Mainland Street will remain closed for pedestrians, as an expected 25,000 people take to the streets each night to celebrate illuminate Yaletown 2011 and help commemorate the one year anniversary of the 2010 Winter Games.