Read my post again for comprehension. I wasn't talking specifically about CFL's, I was talking about fluorescents, of which CFL's are a subset.
You say they don't flicker; but you haven't proved they don't. You talk about ballasts with a higher cycle rate -- but do they not flicker at all, or do they flicker "imperceptibly", the way fluorescents on 410-cycle AC would?
Other people are posting info, you're playing games with posters.
And they don't flicker. Thank you.