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A germicidal lamp (also known as disinfection lamp or sterilizer lamp) is an electric light that produces ultraviolet C (UVC) light. This short-wave ultraviolet light disrupts DNA base pairing , causing formation of pyrimidine dimers , and leads to the inactivation of bacteria , viruses , and protozoans .
Ultraviolet germicidal irradiation (UVGI) is a disinfection technique employing ultraviolet (UV) light, particularly UV-C (180–280 nm), to kill or inactivate microorganisms. UVGI primarily inactivates microbes by damaging their genetic material, thereby inhibiting their capacity to carry out vital functions.
A flicker light bulb, flicker flame light bulb or flicker glow lamp is a gas-discharge lamp which produces light by ionizing a gas, usually neon mixed with helium and a small amount of nitrogen gas, by an electric current passing through two flame shaped electrode screens coated with partially decomposed barium azide. The ionized gas moves ...
They give light immediately on startup, but usually need a few minutes to restrike if power has been interrupted. Because of the light emitted by the filament, they have slightly better color rendering properties than mercury-vapor lamps. Self-ballasted lamps are typically more expensive than a standard mercury-vapor lamp.
Normally, the quartz envelope of standard low-pressure germicidal "G-series" fluorescent lamps is intentionally doped with materials to absorb mercury emissions below 254nm. This is to prevent ozone production in situations where ozone is not desired (in an EPROM eraser or mineral-hunting lamp, for example).
Different metals emit light at specific wavelengths when energized, and this characteristic determines the lamp's color output. Gas Discharge Process: The lamp's operation involves creating an electric arc across the electrodes within the arc tube. This arc generates intense heat and excites the gases and metal additives within the tube.
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