1000 watts wil cover alot of space and 2 even more, if ur space isent huge u dont need that much watage it would get very hot unless your space is large anough and well ventalated, get a HPS ballas and 1 HPS bulb and 1 MEtal Halide both of the same wattage you can run your Metal Halide in the same ballast as the HPS of the same wattage.