This concerns me. About a year ago I went onto a website and ordered 56 led bulbs for my entire house and thought I got a fairly good deal. They worked seemingly well but my eyes always felt strained when under them. Just took my iphone and can definitely see the flicker with slow motion. And when I look at items as I move my head across the room I feel like I can see it as you say and never really knew what I was experiencing before. As someone who always talks about having sensitive eyes to light I am definitely not happy about this and am now thinking about buying flicker free bulbs. Thanks for sharing.