Quote Originally Posted by Petee716 View Post
He asked if I had a non-GFI outlet. I asked him if he had a sign that didn't have a short in it. It was kind of uncomfortable. He took the sign away and brought another which worked ok. He wasn't happy.
Awesome...

Long story short- GFI and electronic ballasts aren't compatible. Who the hell knows that?
I did... But ya, I found out through similar circumstances. Lots of head scratching...