Help with grow room lighting plz

Im buiding a 3ftx3ft grow room that is 4ft tall out of ply wood and sheet rock, im putting 2 fans one for intake and one for out take, i have organic soil, fox farm nutes for after one month of veg, using a 400 watt hps for flowering, plan on growing 20 plants in pong cups and figure ill get like 7 females from bag seeds out of 20 bag seeds growing. My question is, how many 65k cfls will i need for good veg lights. Also If i veg for like 1 or 2 months with cfls then flowered with my 400watt hps in my grow enviornment what do u think my yield would b.

way too tall! rooms 4 ft tall...I just told this to another guy, and it's golden material. google "large yield in small spaces" it's a hightimes article. guy has about the same size space as you and harvests huge. good luck.

the space in the article is 3x3x6

i need to know about lighting and it dsent say, im tryin to figure out how many cfls ill need for veggin

i dont think your gonna need to veg that long in a 4' high box you should just add like 2 cfls along with your 400 and veg for like 2 weeks (if that) then flower..

im assuming you dont have the 400w yet or you wouldnt ask about cfls. the general rule is 70w per sq foot. first thing to look at is you only have 4 feet, count one foot for the light itself, then unless you have an incredible way to cool that hps thats another foot. so we got 2 foot plants here. this means you need to do a sog/scrog method with about 9 plants. so we want 9 plants...you cant grow a plant in full veg in a pong cup-by the time there old enough to show sex, there root system will be too large. i have found odd ways of showing sex but that involves playing with the light cycle and if its your first grow we will keep it simple. now also if this bagseed is high grade, the chances of it being female are high due to the bud its from is a female plant and was not pollinated until the end of its flowering cycle, otherwise you would have ended up with a ton of seeds in the bud making it schwag-please do not grow schwag. now your gonna need chicken wire or something like it for the colas to grow through due to them being so close and the stalks will be somewhat skinny to hold the buds. in this method you also need to trim it so the plant doesnt have useless leaves that do not get light. the best way for this method is hydroponics though because the roots have alot more space than in 9 small pots. if you still use soil, your only gonna be able to grow 4-5 plants in there. the plant will double in size from veg to flower. my plants generally reach over 4 feet indoors. with the sog method you would get about 2-5 oz depending on conditions and your green thumb. also you will lose 60-70 percent of your weight when drying and since the bud isnt shipped, squashed, or otherwise, what looks like alot may be half of what you think. when i used cfls, i used one 26w per plant.

Thank you very much hughes, that was very helpful, i was planing on mabey doing with 12 27watt 65k for about 1 to 2 months after one month of growth ill put into gallon buckets, then when flowering ill kep 4 of the cfls running underneath and a 400watt hps , i belive ill get great growth and great bud doing this, feel free to comment this or give advise