help with lighting

i now have a 4 1/2ft length 4 1/2 ft height and 1ft 10 width closet setup with a 4ft shoplight that has 2 cool white tubes for veg. earlier i went out and bought some flat white wrapping paper and have now set it up around the walls. idk if this will work but hopefully ill get some results. i have grown 3 times before and each time got wicked airy buds. is there any way i could fix this? and for heat cause its kinda cold in there, i have an outdoor spotlight thats works great. what would be the best method of growing(SOG, SCROG, etc.) i i have a hydroponics system that works and flora series nutrients from general hydro, so either soil or hydro will work fine. i would probably like to grow in soil so i wanted to know if i could make my own soil ratio and use the nutrients? idk. any recipes?? also i have a 100w hps bulb, but no fixture or ballast. is there anyway i could make one?
any help is appreciated, thanks