I'm not Canabecea; but you defenately want total darkness dude. Take it from hundreds of people on here and other sites that will tell you the same thing bro! About the transplanting; do it before you put them on 12/12 so they will be in those pots till harvest. I have mine in two gallon pots now and they are 2 1/2 weeks 12/12. It would'nt hurt to give them a good flushing too; to get any salt buildup out of the pot. Flush till the water comes out the drain holes clear. It will be a yellowish color at first; but you may need to flush three or more times to clear it out. You will find that this will give them a boost and when you do this the last flush use a 20 20 20 fertilizer 1/4 strength; because this will be their last hit of N. After you put them back under the lights wait two or three days or when the soil starts to break away from the sides of the pot and then give them a good full strength dose of your bloom fertilizer.