hey guy's, another quick question. a buddy of mine has some t-12 fluoro's he's wanting to use in his grow. I looked up the bulbs, and they have a 4200K color temp. I know some MH bulbs have the same temp, so would these be good for flower or veg? Or could he use them the whole grow? He's going to be using mainly CFL's, but thought these could help. How should I recommend to use these?