well it is good to use both specturms as ive been told but im no expert by far,12-14 seems like if you can afford to run 2 hids for veg as well i would,as wel as the side lighting,they have me stuck on lots of light and lots of bubbles so thats the advice i give lol as long as your not worried about being hot spotted or power bills go for it.thats just my opinion
Yes I am stuck on lights and bubbles as well. I have about 6500 lumen per Sq' of cfls' in my 2'x3' grow area now along with 5 12" airstones in a 4 gal. res.. I have learned quite abit about cfls' but still do not know anything about Hid lighting, just starting to learn about them, but of course everyone says their ballasts or lamps are better thank the other guys. I was thinking about LED but as with most people I am gun shy about the $$ and not convinced about the tech. either.