Quote Originally Posted by GaGrown
The fan in a digital is a part of the ballast that is needed for the digital to operate properly.If not kept at a consistant temp. it will cause stroboscopic problems. That would be flickering of the lamp due to overheating. Or just getting warmer than the board on the inside should.:thumbsup:
My point was that on high-end ballasts, you'll find no fan, because their ballasts don't get warm enough to warrant one. If you have a fan on your ballast, it either isn't doing any good, or the ballast is not tip-top.