Flourecent light bulb question
Do not be concerned. Flickering will not be an issue with CFL's. It can and is with regular tube fluorescents. The only issue you will face is time to get to full brightness. I also have them all through my house and they light up pretty fast. I have one on the front porch fixture. It takes about 1.5 minutes to reach full brightness in cold weather.
The long bulbs flicker because they are filled with a gas just like the CFL's, but they have much more area inside the bulb, and that takes a while to get juiced up in cold weather. The CFL's have very little area to activate.