I've been in my new shop for almost a year and a half now. It measures 24'x24'. I currently have six 4' fluorescent lights evenly spaced in it. The problem I have is they are not made for cold weather. By the time I get them warm enough to come on, if ever, I'm finished working. Do any of you have a good lighting scheme for cold weather? I really like the fluorescent lights when the weather is warm enough for them to work. I would appreciate any input.