Plasma is often called the "Fourth State of Matter," the other three being solid, liquid and gas. Plasmas are estimated to constitute more than 99 percent of the visible universe. Our 4” Plasma Ball creates an amazing light show! A little bit of science, a little bit of art, and a whole lot of cool! Blending specially formulated inert gasses, creates a dramatic display of light inside a hand-blown glass sphere! Fascinating to watch, this light is even more fun to play with! Just place your fingers on the glass surface and watch as colored bolts of glowing light follow your every move. You can actually "feel" the energy as the light gently tickles your fingertips! Featuring a 4" glass sphere, the plasma can be viewed from any angle, and comes complete with its own AC power adapter and unique designer base that compliments any room. AC Powered - Adapter included.