Here is another awesome clock that puts on a show day or night. This Plasma Fluorescent Light Bulb Clock shows lighting arcs inside when you turn it on. It is shaped after a regular light bulb. You can put it on your desk or mount it to a wall.
The Plasma Clock stands 12″ high and has a 10 x 5.25″ base. It has a push mechanism in the back to set the time.