this post was submitted on 03 Dec 2025
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All lights? Also battery-fed DC lights somehow?! I'm no expert but that seems strange
I've caught a lot of lights and light-emitting displays flickering with the 980fps camera that's built into my phone (best thing since sliced bread for a nerd like me), but also quite many lights appear solid. I'd imagine few have such high-frequency electronics that it pulses well beyond 1 kHz. Otherwise the sensor should sometimes capture a frame during a low or a peak
As an example, I was recently looking at car lights in Germany, expecting to see duty cycling in most modern ones, but the majority (2/3rds or so) were actually solid so far as I could tell. A few cars had a mixture of flickering and solid lights in seemingly the same fixture. All flickering ones were high frequency though, not like 50 Hz as grid-fed lights do but much more. I didn't bother with ffmpeg and counting frames but I estimated on the order of 250 Hz for one of them
"Sunlight inside" is a lightbulb brand. Led with a modulator.
It's not actual sunlight.
Yes all lights flicker. That frequency number is how fast it flickers.
There has been attempts to reduce flicker.
It has to do with how electricity works and the filament in the bulb. I honestly don't know the details except that some tech has reduced it in LEDs. They say it no longer has flicker but it's still there. Just reduced.
I'm going to post another image relevant to this.
Illustrates two ways to combat flicker in LEDs. It's still there. Just less visible to humans.