Groovy 60's Flashback Decor Electric charges passing through a blend of inert rare gasses create ever-changing arcs of lighting inside this groovy mushroom-shaped lamp. Each glass container is made of hand-blown blue/purple glass and includes combinations of blue, green, and red phosphor coatings to enhance the brilliance of the lightning effect. Because the glass is colored, the effects can easily be seen in a lighted room or without a dark backdrop (as is the case with most plasma balls). Touch it and watch as the lightning safely interacts with your fingertips! Glass measures 11" x 6" x 1". AC powered.