Yeah, after some research, it seems Lumatek digital ballast's do not have fans. In addition, there seems to be two major types. Ones with fans and ones without, they both claim there is is better for one reason or the other. The ballasts that have fans claims there's stays cooler and therefore lasts longer, the ballasts that say they don't have fans, say there's last longer because it has no moving parts. After much searching, they both seem to have had some returns for one reason or another, usually related to the cord. I did not find any complaints about fans breaking or anything like that. The digital ballasts without a fan seem to have a wider price range, depending on brand name and who is selling it. Just about, all of them seem to be manufactured out of Taiwan including Quantum, which are the most expensive with the nicest box and have fans. No idea which ballast is the best however all the ones that are UL approved are more expensive than ones are that are not? Anyone that has any electrical knowledge that knows why one is better than the other, it would be nice if you had an opinion. Thanks!