grow room help

[mdoubles]

hey, im sure theres tons of these posts for grow room help around and i know it must get tedious for those who answer the newbie grower questions so i thank all who contribute to help my grow be the most successful. im about to grow in a closet in my room and i just wanted some advice as to the lighting. ive looked around for other posts with similar closet dimensions but mine seem to always be slightly off...and the few inches off may be the difference between 2 lights or 1...and i of course want the grow to go as smoothly as possible with the best results so i figured it was best to obtain the answers that relate directly to my size. the closet is 100 inches wide, 30 inches deep and 72 inches high. im not afraid to spend a little cash on the lights as im planning on growing some top notch green (looking to order some white widow or some other killer variety)...although i dont want to go overboard, somewhere along the lines of $100-200 if need be, i am fine with. so if anyone could give me the optimum lighting solution for these dimensions, that would be awesome. thanks in advance to all who reply