Yea, that was an option I was also considering. I have the paranoid factor though, I like to keep the closet locked when I'm not around, and on 18/6 I'm not going to be around all the time the light is on... That could work out though, if I used the T5 for veg, and then used the HPS for flower, since I'm around generally for 12hrs straight and I could leave the door open when it's on.
Anyway, yea lets just wait till I at least get a grow or two through before I worry about this lol