Then don't comment on something you know absolutely nothing about. The OP clearly stated DIGITAL BALLAST that runs BOTH TYPES OF BULB.
It's that kind of pure shit posting that ruins places because it confuses people. If your experience has NOTHING to do with the topic, DON'T POST.
Idiot.
This post was asked, answered and done within 10 minutes. Thanks to shit posting, it's now a pile of false, misleading, confusing and completely wrong and worthless information.