if your only growing for personal use you probably do not need a 4 by 4 area or a 1000 watt light its would be a big jump to go from what you have now to just a hid depednding on how much you want to yield, your flower room size should match your light and shoot for 50 watts per sq ft of hid lighting, if you are just growing for personal use, a 400 in a 2 by 4 area or other size that equaled 8 square ft should supply most people if they are cloning and using mother plants to there advantage.
bejay Reviewed by bejay on . Almost done my first grow, time to revamp setup? Right now im growing with 10x 26 watt CFL's (17,000 lumens), 3x 12v computer fans for ventilation, and a box that's about 1.5x6x6 feet. Would yield greatly improve if I implemented mylar around the entire thing, and made a new box with centralized light like 4x4x6 feet? Is 17,000 lumens enough? Or should I add a couple more CFL's? Should I add another fan? Rating: 5