Teardown of a $1.25 LED Lightbulb
Some of these cheap LED bulbs have horrible flicker.  For a fun time, record a slow motion video of a cheap bulb on your phone and play it back. Like half the damn video is black (pretty sure it is because they literally chop out half the AC sine wave with a diode).   LED Christmas lights are also really bad.Then compare it to something like a Phillips hue bulb.  The difference between the two is pretty big.On a side note I sometimes wonder if other animals have a quicker “refresh rate” on their eyes and see nothing but very visible flicker on these bad LED bulbs.  I also wonder if some animals could see the raster scan in action on old CRTs...