@ buddhabound @ RosethornRangerTTV To be clear for others: it's not all lights, but certain types of lights and equipment.
Flourescents are notorious for this because they don't operate on a constant current, they flicker and hum at very very high rates. But they very often have just enough inconsistency to put it into the edge of human perception... if you're brain is good at filtering sensory input, you'll brush it off and have to concentrate hard to notice it... if your brain is bad at it, then it'll be a constant torment.
Incandescent bulbs don't have this problem because they're constant.
LEDs only have these problems in especially cheap or faulty models, and it's a separate problem between hum and flicker. They run on DC power, so the light itself isn't particularly bad, but a cheap DC converter can cause a hum (many of us will notice this from cheap phone chargers as well). As far as flickering, this only happens in cheap dimmables when not operating on full brightness, and this is because the cheap dimmables dim by using Pulse Width Modulation (they dim by literally flickering and changing the rate of the flicker to make it brighter or darker).
