Cute Young Brunette Girl Posing With A Neon Tube Lamp

• Pilot lamps that indicate the presence of electrical power in an appliance or instrument (e.g. an electric coffee pot or power supply).
• Decorative (or "figural") lamps in which the cathode is shaped as a flower, animal, etc.. The figures inside these lamps were typically painted with phosphorescent paints to achieve a variety of colors.
• Active electronic circuits such as electronic oscillators, timers, memory elements, etc..
• Intricate electronic displays such as the Nixie tube.