Well i guess i could go 24 if i had to. Thats for makin the plant taller though isnt it? I'd have to run 12/12 sometime and its just starting winter.well unless youre gonna go 24, you should prob start stockin up on blankets. if you wanna get a heater, that's your deal. but otherwise, short of running the dryer outlet through your attic for warm air, you prob won't be able to do it til it warms up. or if you're a handyman, you can run an extension from an a/c or heater vent to the area to keep it warm. do you have an a/c vent in the garage that you could use?