Filament LED bulbs usually flicker at 120Hz (with high duty cycle) and Christmas... | Hacker News

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		Robotbeat on Feb 19, 2020 \| parent \| context \| favorite \| on: Teardown of a $1.25 LED Lightbulb Filament LED bulbs usually flicker at 120Hz (with high duty cycle) and Christmas LEDs at 60Hz (with a short duty cycle). Other LEDs are, indeed, high frequency like you describe and are perceptually effectively constant.

vidanay on Feb 19, 2020 [–]

The filament in a filament bulb doesn't fully cool down when the voltage crosses to zero, so that smooths them out a lot.

Sorry...I just noticed you are talking about filament LED and not old fashioned analog filament bulbs.

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