IS THERE A GOOD GROUND? Electronic ballasts need a good ground to work properly.
Having a good ground also includes having the sheet metal next to the bulbs being grounded too. Usually the fine print on the ballast states bulbs must be mounted within 1/2" of grounded reflector.
Also make sure the bulbs you are using match the ballast. Especially using T-12 bulbs with T-8 only ballasts.
edit to delete UBB code.
[This message has been edited by LarryC (edited 07-29-2006).]