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Most dimmer switches work by turning the light off for a certain amount of time...a light bulb connected to 120V 60Hz actually turns off 120 times a second...If you have it turn off 60 times a second (and stay off longer each cycle) it appears to be dimmer...This is what SCRs and Triacs do...They turn AC voltage off for a period of time,while still swithing fast enough that your eye sees no flicker.

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17y ago

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