well imo I would not leave the garage door up I would bring in all the cold air through the window and exhaust through the roof via a whirly bird or a gable mount fan. 2nd I do not think 2 1000w lights are enough to properly cover that area, with tracks the biggest I would go is a 6' track which will give you 8' of coverage since the lamp hangs in the middle and sticks out a foot on either side so that gives you an 8x8 space maybe streched to a 10x10 at the most personallyI would have at least 4 stationary light in a 10 x 10 but that just me have them on opposite ends from each other for better coverage