If your like me you'll always question yourself and your lighting if you don't go with your first choice...lumatek. I would also rather buy the NON-air cooled lumatek and add on lumateks external cooling fan-$12.bucks-and the reason is the external fan setup will run cooler then the one with an internal fan. I run 2 lumatek 1000's..yeah I could of gotten something cheaper but I didn't just buy the ballast, I also bought peace of mind with the lumatek. Also do yourself a favor and buy digilux bulbs for your lumatek they're 155,000 lumen's while all the rest are 140 to 150,000 lumen, might as well squeeze every last drop out of the lumatek. Just my .02's worth.