I suppose it won't be the best because all the lights, fans etc that people use are there to try to recreate the natural growing environment. There's a thread in one of the other sections called Diary of a Madman (i think) and the guy basically just germinated some seeds and gave them only natural light. They were really stretched after a while and didn't have a chance. Of course, this would depend where you live and what the climate is like and so on.

Growing is a bit of a balancing act it seems to me. At the moment, I've spent a bit of cash getting a decent setup and after I've done all this, I figure out that the PH in my water isn't the best so I have to get some PH down to sort that out. Now I'm thinking the temps could be lower so I'm wanting to get a cool tube as well. There's always something else that can use improvement y'know. I think it'll be worth it in the end though