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Unlike an incandescent bulb, the filament is not the source of light in deuterium lamps. Instead an arc is created from the filament to the anode, a similar process to arc lamps . Because the filament must be very hot before it can operate, it is heated for approximately 20 seconds before use.
A high-pressure sodium street light in Toronto A high-pressure sodium-vapor lamp An HPS lamp that isn't entirely off. A sodium-vapor lamp is a gas-discharge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm.
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In 2002, 16 years after his last NBA coaching job, Brown, at age 69, was hired by the Memphis Grizzlies after Sidney Lowe was dismissed following an 0-8 start.
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