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A tri-light bulb, commonly known as a tri-color or tri-level bulb, typically features three distinct light settings—often low, medium, and high—controlled by a standard switch. When the switch is toggled on and off, the bulb cycles through its light levels, adjusting the brightness accordingly. This is achieved through an internal mechanism that alters the amount of electricity flowing to the bulb's filaments or LEDs, allowing for different light intensities without needing a dimmer switch. The bulb's versatility makes it ideal for various lighting needs in a single fixture.

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1mo ago

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