Quote Originally Posted by gainesvillegreen
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.

Go buy you a Future-Brite and use it for a month.. Oh,buy a light meter. Put the same lamp in your ballast and one in the Future-Brite.. I would be willing to bet that the lumen output will be greater,than with a another brand. I've tried several,and the future-brite outshinned the 4 others I tried. The fan is in the housing for a reason..