I have a closet thats 4 feet wide 20 inches deep and 5' 8 inches tall....im getting a hps light and 2 computer fans 1 of exaust and 1 thats intake and wanted to kno which one wud b better suited for my situation a 400w or 250 watt hps to get maxiumum yeild without overheating the grow area. Please help i jus recieved the seeds in the mail and want to get started