Thank you for asking this. Flicker drives me absolutely mad, and it seems like no one else I've met experiences it (and trust me, I've asked a lot of people).

  • Cheap lights on a bike? Flicker.   
  • Lights on an expensive SUV? Flicker.   
  • Lights at Starbucks or at my library? Flicker.  
  • My phone (Pixel 5)? Flickers (I use a PWM reducing app that works by applying an overlay).  
  • Nearly 30% of all lighting at homes/commercial spaces and nearly 100% of those LED Edison bulbs? Flicker.

And if it didn't give me a headache often I wouldn't mind that much, but unfortunately it does.