Dual action light bulb

Year	Description
1991	Invention patented by Randall J. Friedman on August 26th, 1991. Abstract: A special effect light bulb combines both cathode glow illumination with fluorescent illumination. A pair of plates respectively electrically connected to a pair of electrical lead wires jointly define a word, phrase or well-known symbol which is illuminated within an inert gas during operation of the light bulb. A third plate, having a fluorescent coating which is activated only by the ionized inert gas, is shaped in the form of a distinct symbol.
Source: selected by the editor from original sources.

Invention: Dual action light bulb