Comment by wtcactus

I found some interesting tidbit about this bigger issue. And I want to share how to more easily check it.

We many times see some people reporting that they clearly see lower quality LED light flicker and is really distracting to them and even causes them headaches.

Now, I didn't see this until recently (unless in failing lights) in the right conditions. If the light is very, very dim: For instance, only 1 light on in the night, and you are in a division far away from the light so that it's extremely dim. There, I could finally really see it flicker.

I've replaced that light for a better one and the effect went away.