Go with t8's not only are they just as if not more efficient, you can fit more of them in a smaller space.
Paht_Hed Reviewed by Paht_Hed on . T12's or T8's I currently got two shop lights using a pair of T12's each and a 400 watt metal halide.I'm going to add another shop light seeing how they're doing so well under them but I'm not sure if I should get one that uses T12's or T8's.If any one knows wich one "out of those two" are better than the othe for the plants please let me know, as well as the reason why if known. Rating: 5