2012-04-24 LED light flash DJ speaker sound RArC1B Stock Footage : "BlueBackIMAGE". https://www.pond5.com/stock-video-footage/1/clipbin%3A67730.html http://www.motionelements.com/c-562-disco-space-3-stock-footages.html http://footage.shutterstock.com/gallery-352735.html