I recently started a new soil grow in my basement. The room stays a great 72-75 degrees with the lights on, and a constant 55 with the lights off. The cold nights worried me so I purchased a small heat mat to place under the actual pot. The manufacturer claims it will raise the soil temperature 10-20 degrees, which I hope will help out. I obviously plan on having it on a timer that is opposite the lights, i.e. only on at night. My question is, what would be the "ideal" soil temperature for the plant? And also, does anyone have experience with using heat mats for a similar purpose?