need some help about area.

So, I have a box 150cm ( 60 inches ) tall, 60cm (23 inches) wide and 60cm ( 23 inches) deep.
Lightening is 250w HPS, and I want to know how many plants can I set under it if I want to do 12/12 from seed?
area is enough big for 10 small 12/12 indicas?

Maybe 9 plants in 2 or 3 liter bottles. Id veg for 10 days in solo cups then transplant to final container, wait 4 days and flip.

It is necessary to always grow a tiny plants and after that transplant them to the bigger pots?
so I understand the veg time should be 10days, i'll take 14 days, after that, transplantation, after transplantation more 4 days veg time, after 4 days, gradually change the time to 12/12?

better to just flip it hard to 12/12, try to minimize the stretch that might turn you plants into larf generating machines. you could go ahead and start in the final container size, but I find its hard to gage when to water plants with undeveloped roots in big containers.

Being a 12/12 from seed grower myself i can tell you that you are only gonna be able to have 4 mature plants at the max in that area even 5 is pushing it unless you plant on using party cups and if that is the case you can do 12,The general rule is 1 plant per square foot using .5-3 gallon containers or 4 cups per square foot.The 250w hps can grow 5 plants with optimum conditions.A word of advice if you are looking for a good harvest you may want to train you plants I find that LST and Lollipopping and is a great way to maximize your yield when using lights 400w and below,optionally a Scrog screen can be use in addition.

HotShot, I gonna use a super crop tehnique, and in wich week i have to cut the top off? if I'm going 12/12?