8 plants, well if i were you id go with 400 mh veg and 600 or 1k hps for flower. word of the wise just be careful man, i used to do the same thing, thought it would help bring in some extra cash, and it did. but after a while it got way outta hand, people i didnt know started calling me up, showin up at my place, to many knew what i was doin, things got really sketch. long story short had to shut the garden down. like i said walk softly and leave no trace