1000w grow light kits are great for grow rooms 6' x 6' or smaller. These 1000 watt HPS & MH bundles and combo packages can help get your grow room started quickly and have you harvesting plants in no time. CMH grow lights have more usable light for the plant which makes them more energy efficient. You can get a 1000 watt CMH light fixture that can cover a 5' x 5' and will also penetrate all the way through a plant like a DE light will. With more usable light for the plant, you tend to get heavy yields, and a more robust plant. CMH lights ... Jul 13, 2016 · And it is this ability to deliver exactly those frequencies the plant uses best, and all at very high efficiencies, that allow the most recent generation of top-tier LED grow-lights to deliver comparable yields and often superior quality to that produced by HID lamps with 30-40% less input power.