beamis
Newly Enlightened
I don't notice any flicker on my 40w or 60w WW Crees. And I'm usually pretty good at sensing this on Xmas lights and other LEDs too.
It's a pretty fast flicker (120Hz on US electricity grid). You wouldn't detect it unless something was moving fast. I notice it on ceiling fans. I don't know why, but it bugs me. I really like most aspects of these bulbs, but that flicker just gets to me. Luckily I have a stash of the Philips L-prize bulbs that don't flicker at all. Hopefully they will hold me over until someone comes out with a 85+ lumens per Watt A19 LED without flicker for this price point.