I don't know how large your closet is so I can't really tell you what wattage to use but IF you can use a 400 watter this is a great deal- www.hydroponics.net has "Garden Light" 400 watt M.H OR (NOT "AND") H.P.S. systems on sale for $120.00. Good luck doing bettter than that for a ass kickin' closet light! Also, buy Indoor Marijuana Horticulture by Jorge Cervantes TODAY!!!! By next week you'll be laughing at the "newbie"'s questions, behind their backs of course! ................If your broke cause your putting your dealers kids through collage then maybe you should just take a peek at his website- www.marijuanagrowing.com What, you want fries w/ that?......................