you're starting with Jack Herer?...my friend you have lofty ambitions,now you need about $400 more worth of equipment,to properly develop this line....in addition to your fan for the 400w...you will need,a sealed contained area,odor control apparatus,thermometers,PH reader,back-up light bulb,flowering bulb,timers,a humidifier)wanna keep that strain goin?throw in a clone chamber.......and you started with jack herer?you have one of the TOP strains in our world,developing it properly, is NOT a closet job,but it can be done(just not to its fullest)...however,with enough technology(money)anything is possible.....good luck to you and your grow