Definitely some good post here. I use 2 8' 2 lamp strip lights, with HO ballast and lamps. These will start in cold weather. I work out of my garage and its not heated, so its important to have HO type lamps if you are in a similar situation. Mercury Vapor and Metal Halide may be too much unless you have high ceiling (20' plus). They will also cost you $$. I think that I pay somewhere between 150 and 500 depending on wattage and type (industrial/commercial). Also make sure that you have adequate side lighting a little lower. I have to put in another light because the overhead doesn't provide enough side lights. Halogen roll arounds are nice, but get very hot. Just some feedback from an electrician.