did you not even read what the poor dude wrote, for fucks sake people...... anyways man, if your plants are huge i am assuming they are ALSO tall, therefore your main production of buds will be towards the top, with smaller ones making way to the bottom of the plant. train the plants so they stay lower and try and make your canopy as even as possible and have your light as close as you can to your plants. i would say that if you are growing inside and enclosed area with lights, it is good practice to LST or supercrop, or even scrog to be able to maximize your light efficiencey since the tops would all be at a set height. . . . . .. 10-15 degree flux with temps between night and day. digital space heaters are nice, set it and forget it......but always be remembering how much your fuckin elec bill is gunna be higher cuz of the heater lol, i am assuming you have hps or something of that magnitude .....yes it will. bring down the temp to 26c or get soft ugly buds.