Cute Young Brunette Girl Posing With A Neon Tube Lamp

Neon glow lamps and plasma displays
In neon glow lamps, the luminous region of the gas is a thin, "negative glow" region immediately adjacent to a negatively charged electrode (or "cathode"); the positively charged electrode ("anode") is quite close to the cathode. These features distinguish the lamps from the much longer and brighter luminous regions in neon tube lighting; technically, the latter correspond to a "positive column" in the discharge that is absent in the lamps. The energy dissipation in the lamps when they are glowing is very low (about 0.1 W), hence the distinguishing term cold-cathode lighting.
Some of the applications of neon lamps include:
• Pilot lamps that indicate the presence of electrical power in an appliance or instrument (e.g. an electric coffee pot or power supply).