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Leaving fluorescent lamps on for long periods of time ____ lamp life.

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Answer:

extends

Step-by-step explanation:

This is because the initial start-up of a fluorescent lamp is what causes the most wear and tear on the lamp. When a fluorescent lamp is turned on, the electrodes inside the lamp heat up and vaporize mercury. This mercury vapor ionizes and creates an electrical field that causes the phosphor coating on the inside of the lamp to glow. The more times a fluorescent lamp is turned on, the more the electrodes wear down. If a fluorescent lamp is left on for a long period of time, the electrodes will not have to heat up and vaporize mercury as often, which will extend the lamp life.

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