Plasma Lightning Storm Ball PLASMA LIGHTNING STORM BALL. Technology at the tip of your fingers The plasma transfer of inert gases forced to arc to your own electrical frequency within the vacuum of the sphere respond to music, sound or touch in erratic waves. This Plasma Lightning Storm Ball measures 6" in height and the base measures 5" in diameter The actual ball measures approximately 3.5" in diameter. Comes in candy blue with UL listed adapter.