Here is a geeky light that reacts and changes its lightning patterns when you touch it. The Lighting Bolt Lamp is made of hand-blown blue/purple glass. It relies on blue, green, and red phosphor coatings to show you a cool lightning effect. The below video shows how this lamp works:
The base is 13″ tall while the glass measures 9″ x 3″ x 1″. You can get yours from Scientifics Direct.