I would like to say thanks on how helpful these posts have been. Question, what would be the effects of using a magnetic ballast with starter with T5HO tubes?
While the bulb may light, the idea behind T5 is to use electronic ballasts to the fullest to maximize output for a given current consumption.
"The T5 lamp is currently designed for operation only on high-frequency, rapid-start, or programmed rapid-start electronic ballasts."
"How to Make the Best Choice"
A Workhorse or other T5 ballast is rather easy to find. (the endcaps and bulb length are also different)