Quote Originally Posted by gus738
im not much into l.e.d and its a route i probably wont consider for the time being, thanks though but if anything it might be supimental or as a side thing but otherwise i plan on veg with mh and hps to get as much speactrum as possible.
Quote Originally Posted by bigsby
You ever wonder how much of that spectrum goes to waste because the plants can't see it?
Quote Originally Posted by gus738
on what? l.e.d or hps/mh
Dude, I quoted you! A great deal of the spectrum produced by HIDs is not usable by the plant, not to mention the heat off of the bulb and ballast.

To be as clear as possible - what Kyber said. Wish I knew half as much.