What Happens If I Put A T12 Bulb In A T8 Fixture?
What Happens If I Put A T12 Bulb In A T8 Fixture? If you place T12 tubes in a fixture with a T8 ballast, you will wear out the ballast and have to replace it. If you place T8 tubes in a fixture with a T12 ballast, then the tubes will have a shorter life