Ok so I read the lighting thread by WaterKeeper, good stuff. Just when I thought it was over.... I found another ballast by Hamiltontechnology.com that is identical to the Icecap 660, but it has a 7ft. wire harness, a 7ft power cord with switch, no heat heat sink (but the company says it's not necessary), I guess it can go under my closed top canopy (I have 3 fans under there), will power 4 bulbs T8/T12 NO/HO/VHO and it is $124.99 . I think this is the one bcause it has everything and I don't have to do any wiring and it will fit under my canopy. If any one knows why I should or should not get this ballast speak now or forever hold your peace. I must say this is a very helpful site unlike some of the other stuffy, elitist, sites I've been to.