you can go to a 12/12 light cycle from seed... the plant will flower when it wants to regardless... as far as keeping the plant root bound, that should work, but a better idea is to bonsai it... keep it in a hydroponic system, and crop the roots every so often... you might want to consider something like lowrider, as it is auto-flowering. keep in mind that the penalties for growing are always worse than simple possesion.