GDP Fem

Agreed, 18/6, but don't expect it to happen very quickly, and in my experience, it is very hard to do and not all plants will do it. Trying to successfully clone a plant that is as advanced in flowering like the one in your picture (the left one?) is extremely difficult. By the time they revert you could grow some healthy and well established seedlings, from seed, in the same amount of time. I am not saying that it is impossible, but growing seedlings would just be easier and no doubt, a lot faster. Hope this helps, Organoman.

Led Zeppelin Beatles over the Stones though.

I don't but I would! 630watts is perfect for a 4x4!!

It does nothing that can be confirmed as effective for all cannabis plants and grown in every condition. I do know however, that extended darkness will slow a plants metabolism to basically zero, and a zero active metabolism can not prevent THC from breaking down. As this is a rather stressful technique, I ask myself - why would anyone want to stress out their plant after weeks/months of careful growing and right before harvest?? It is also completely unnatural. Hope this helps, Organoman.

You have a good chance of getting mostly Feminized. But just know they carry the hermie trait, so there is always a chance some of them could easily hermie naturally or under stress. There free seeds tho, and you may get a good pheno out of them. Gorilla Glue #4 was derived from a hermie strain and it's super good!