Yes and No...
T-5 HO ballasts are all kinda different...
you have magnetic, or electronic.
you also have those IceCap overdrive ballasts, also called T-5 VHO
so a combination of bulbs and ballasts can actually affect the end spectrum and in some cases PAR as well.
so if you took a cheap quality ballast and put on ATI bulbs, you would not get the same results, as having ATI bulbs in an ATI ballast. Companies tend to make a good relationship between their ballast and bulbs and for good reason, one is performance, and the other is for profit.
so while you could in most cases use any T-5 HO lamp on any T-5 HO ballast, you might not get the best results in most cases.