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Yes. It is done by a technique called pulse width modulation. Similar to the principle used by incandescent lamp dimmers. Reduced duty cycle = reduced average current/power = reduced apparent brightness. Integrated circuits for this purpose are available from several sources.

Artificial means of dimming LEDs also exist such as the patent-pending LEDdim dots and blocks.

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12y ago
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Q: Can an LED light be dimmed?
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