Truth is even though all plants need to be at a above average temp to thrive(i feel 70 is a minimum and 85 a max), autos have rudarailus(zero clue spelling it XD) in their genes and that helps them live in colder temps. Most people think I'm crazy as hell cause my apartment stays 67 MAX in buffalo winters so anyone that likes it slightly warmer than me will be fine inside when you count the degrees from lights.