On May 28, 8:10*pm, "SBH" wrote:
If the ballast is not a T8 ballast, it will not work. You need a T8 ballast.

My guess is since the fixture already contained T12 lamps, the ballast isn't
for a T8. Therefore, you'll need to change the ballast.

+1...

With most "shop lite" type fixtures the replacement T8 ballast would
cost
you more than buying a replacement fixture with the proper ballast for
T8
lamps already installed in it...

~~ Evan