Hi,
Hoping someone in this group can help with strangeness that has started after replacing a failed ballast for fluorescent lighting.  This lighting is on a motion sensor that worked great prior to replacing the ballast.  Now, when set in motion sensing mode and if the lights have not been on recently, they flash for 10-20 seconds before finally fully illuminating.  If I switch to "ON" (not motion sensing), the lights come on fully and immediately.  This just started with the replacement ballast - worked fine before hand (and two other fixtures are working like this as well).

I know fluorescent have their peculiarities and it's almost as if there is a combination of how much voltage the motion sensing mode is sending and something possibly about my ballast replacement causing this.  Any ideas or pointers will be greatly appreciated.

Thanks