my grow tent is 2x4x5' high and is in my basement. it's been perfect down there over the summer, but it gets pretty chilly in the winter. it shouldn't be a problem to keep the temps right while my lights are on, but i'm not sure how to best keep it warm enough in there when they're off. i imagine i could use a tiny space heater on a timer, but i can't seem to fine any that are really low wattage. it's a small tent, so i shouldn't need much. any input would be very appreciated!