I will be purchasing a 6 tube t5 4ft HO fixture. I have been running 2 400 watt hps lights on my true first plants from bagseed. They are happy girls but the hps is too damn hot to add another to so I would like to try the t5s. I understand that t5s can be efficient with the sog mehtod however I am very undecided on the pot size. I have many good clones but I want to know what the best pot size for this application would be since pot size seems to be the main limitation of what I can put under this light. The best idea Iv had yet involves 2 litre bottles painted black. My justification for thier effectivness is that they are tall(Iv read cannabis roots grow taller than wide) and they are free. Im using ff big bloom and tiger, as well as cal-mag and liquid karma. if ya wondering Please criticize my ideas and methods....but my main question is of the sog pot size?