my set us is in a 3 by 3 by 9 closet, i'm growing nirvana ak 48, i plan on painting the walls white or should i use mylar

LIGHT?

1. what type of light should i use after they sprout and for veg?
T5's are best for seedlings IMO but there not really worth the money.


2. should i use 250 watt mh or 400 watt for my space?
250 will be Way too low. 400W would be 4000lm/sqfoot, which is still kinda low you watn above 5000

3. when the veg is over and i want to flower should i use a 250 hps or 400 hps\
400W hps would give you 50 000lumens (i think) which would give you 5500lm/sq foot. you would not want to go lower than this. i would go for 600W more light more buds. near linear relationship and 600W produces mroe lumens/watt

4. do i need to buy another light or just get an hps bulb
you will need two different ballasts. Unless you want to get conversion bulb for the veg stage.

AFTER GERMINATION?
5. what size pot do i need to plant them in?
What do you watn to be the biggest size? Then try to minimize how many trimes you need to transplant to get there. I transplant once or twice. For clones and seedlings

6. how many should i grow for this area? 3ft by 3ft by 9ft
depends on your method. Ie sea of green, super cropping, giant trees.

7. do i need different types of soil for getting it to sprout and the veg process?
you want weak soil for seedlings so you dont burn them. then it's up to you

8. what should the light cycle be in this stage
18/6 or 24/0, its up to you

VEG?
9. should i let if veg for 4 weeks or 6 weeks?
you will want to veg for much longer, me thinks. you will be surprized how small your plants will be after 4 weeks. Also, it depends on your growth method

10. what should the light cycle be in the stage?
18/6 or 24/0 its up to you