I think Circlines are really cool but they're really not bright. I had the opportunity to buy a 1X1 surface mount circline "troffer" fixture but I didn't. I really wish I did though because the next visit it found it's 1X2 2XF20T12 twin and it would have been nice to have both lights as a pair.
I eventually got the Commercial Electric version of it though, but your US made GE lamps looks nicer.