I used to veg uner T12 shop lights very happily and may return to using them if I decide to go full-spectrum for flower and put my metal halides in the flower room. One really nice thing about tube flouros is that even if the plants grow right up into them, any burns are pretty mild and cosmetic... I had better luck and better shaped plants come out of veg under tubes than I ever have with CFLs. Just a couple cents...