i hate to be a newb but we have all been there

if i were to put bagseed at 12/12 how to all would they grow when i harvest. im asking so i know how big to build my box. my hookup can only get me a dime a month due to him moving so i need a way to get some more.

I would suggest at least 6 ft. No telling how tall they will grow. depends on the strain and the type of light your using

what kind of lights are you using as low as 2.5 feet

i will prolly be using a 100 to 250 watt hps. i thought cfl were a good choice but it doesnt seem to be as effiecient at the same wattage. but yeah this is by no means a room i want it to be a small cabinent. and just wanna know what a realistic height seting would be

I think if you want to keep it small that 3ft should work, but you are growing from seed so it kinda hard to tell what they are going to end up like, with clones you could flower at a certain height so they end at the height you want, you first grow is going to be a little trial and error, just build as tall as you can, you can always lower the light or raise the plants, once you get things dialed in then rebuild your perfect box

what if i where to grow a mother plant first and then build the grow box to how the mother is??? and is a 250 hps alright cause i found one with a ballast for 80 dollars.