Can someone please elaborate a little more about this grow method please?

It seems simple enough. I have a feeling though that I am missing something. Are you using the airstones to oxyginate the water or for the purpose of making bubbles so water splashes on the roots or "pot" of the plant? In the case of the latter then surely you must neede quite a powerfull air pump to create enough water agitation. Well it must be powerfull compared to my aquarium air pumps anyway...

I think this is the route I may take with my grow. So any additional info would be great. And Im dropping around $500 on ligting so I am serious!