Hey dude. I'll try my best to help ya out here.

1. Dont measure the light output in lumens measure it in total watts. The standard is at least 50 watts per cubic foot not square foot. So figure that out and you'll have your number. I would add whatever lighting it takes to get to that number. Also use jsut the cool bulbs for veg and a combo of both cool and warm for flowering.

2. Go with 12/12 not 11/13

3. No. You will get either male plants or females plants. There is a chance of a hermie plant(which is both sexes)but you do not want this plant to pollinate itself or any of your females. Once they show sex(2nd week of 12/12 usually) remove the males from the females. You dont want seeds in your bud. They degrade the bud and reduce thc significantly. One option to using seeds is to take cuttings of a mother plant.

Keep in mind for the dimensions of the box that the plants will double even triple sometimes during the flowering stage. Also figure in the pot size as well. Good luck.

heres a link to my grow log to give ya some ideas.

http://boards.cannabis.com/grow-log/...ed-w-pics.html