Hi AFN family. I'm thinking about moving my 2 plant grow into my garage and making it a 4 plant grow with a higher powered HPS as opposed to LED. The heating in my garage doesn't work that well, It doesn't get freezing in there but at night it can drop to 50 F. I was going to keep the light on for 20/4 but would those 4 hours in the cold have a negative effect?