I've been growin' for a lot of years and I've never felt the need for a humidifier or dehumidfier.get a decent recirculating fan,some decent aircooled lights ,a decent supply of cool intake air,filtered exhaust and your choice of medium and nutes, a few timers and your a genius success.don't make it rocket science.Enlighten & Expand.'Buz... if any of you homey's need some help with some growin' TLC. feel free to catch me at my email addy. its in my profile.