Neon Lamp

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Neon lamp

Consists of a glass tube from which the air is extracted and neon gas added. The tube glows when current flows through it.

Neon Lamp


a low-pressure gas-discharge light source in which visible radiation is produced by a discharge in a neon atmosphere. The best-known neon lamps are the glow-discharge signal lamps, in which the orange-red luminescence of the discharge regions adjacent to the cathode is used. The lamps are filled with a mixture of neon and helium. To decrease the discharge voltage, a small quantity of argon is introduced into the gas mixture, and the surface of the cathode may be coated with a thin layer of an activating substance. The lamps operate on alternating or direct current. Their power is 0.01 to 10 watts (W), their light flux is 0.02 to 5 lumens (lm), and their current ranges from fractions of a milliampere (mA) to 20–30 mA. In cold-cathode neon lamps used in advertising (fluorescent lamps), the glow of the positive column of the glow discharge is used.

Neon arc lamps with a heater cathode are used as airport beacons; their power is of the order of 500 W, and their luminous efficiency is up to 10 lm/W. They operate reliably at ambient temperatures from —40° to 40°C. The luminous efficiency of mercuryless, fluorescent neon arc lights (about 25 lm/W) exceeds that of red-fluorescent mercury lamps by a factor of 3 and is determined by the visible radiation of the positive discharge column and the fluorescence of a phosphor layer (such as Y2O3 or activated europium) deposited on the walls of the tube. The lighting and electrical parameters of fluorescent neon lamps, in contrast to those of fluorescent mercury lamps, do not depend on the ambient temperature.


neon lamp

1. A cold-cathode lamp whose principal light radiation is due to passage of an electric current through neon gas.
2. Any cold-cathode glass-tubing lamp, such as that used for electric signs, regardless of the type of gas that fills the lamp or the presence of phosphors or filters to control color.
References in periodicals archive ?
A neon tube protrudes from the pants to land on another chair to which are affixed women's knickers and a brassiere.
The battery-powered neon tubes come in nine colors: red, green, pink, purple, turquoise, yellow, orange, white and blue.
Gone are crucifixes, instead we will all be carrying around neon tubes to ward off evil.
It" is two neon tubes which mount on the underside of a car and create a ravishing fusion of color and light whenever you flick a switch on the dashboard.
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Semicircular turqoise neon tubes from an archway over the frozen food department.
Alluma Tech's low mercury neon tubes now have 60% to 80% less mercury than conventional neon tubes.
60 and a plus sign using neon tubes sealed in bottles to highlight their participation in the 60-minute power switch-off campaign.
The incorporation of white neon tubes propped inside each structure nods to Flavin's own recasting of the monument as something impermanent, replaceable, and inherently lowtech, and responds ambiguously to the question: Are these artifacts of a utopian project that has retreated into history, or do they harness a power that will be revealed in the future?
As the light changes, from day to night, the yellow light from the neon tubes intensifies and you will often see it reflected in the puddles.
Neon tubes for the forest and later as a frame for the sweetest of houses, offered no magic for me.
What was once "Cockayne" to our peasant ancestors living in the forested glades of the old Cleveland - the time when work in the fields could be abandoned for a few days to make way for drinking, feasting and story telling - has become a high octane commercial festival for the makers of neon tubes, electronic gizmos and random electronic noise inspired from across the Atlantic.