are you going to use that 1000w mh in your rubbermade box? That light requires at least an area equal to 5x5x6.5 feet. Thats a big light. as long as you can vent it. Whats the condition of everything. Is it a digital ballast? they conserve less electricity. what is the gph on the pump? what type of system? ebb and flow I take it. are the bulbs new?