My 4’ old ballast burnt out its and old 70 one weighing a ton anyways I purchased a new t12 ballast but this one has 2 red 2 blue and 2 yellow old on didn’t have yellow will this work I was told to cap the yellow and run the red and blue the way they were in old ballast connect power and be all set but the bul is really dim. Any suggestion my company don’t want to switch to led which would be a who,e heck of a lot easier