Hey man i cant help you with the lights and stuff ...But i can help you with the strain....Big Bud...Its all i grow ..But my closet it 6 foot tall and 10 feet long and 5 feet wide.. Its good growin space for 1-3 plants but when you put in to 12/12 you better watch out ..Thats how my first grow went bad i had 2 400 hps...And 6 plants i let them veg till they was 4 foot tall ...And as you know when you put in to 12/12 the double or triple size.. They just shot up in growth and i couldnt keep controll of them because i tried tieng my branches to stem because the branches were too heavy with flowers and they were too bushy to get around them ..so couple branches broke ...So then none of them got enough light and started dieing...So i would stick with 1-3 plants ....Because Big Bud is a huge strain...Also dont be like me and flower at 4foot tall make it 1-2 foot tall...Heheheh ...Good luck man hope i answerd how many plants you can get in closet if not sorry for crowding up thread....