ARC 1000 Watt MH- Metal Halide Grow Bulb Light Lamp Hydroponics 110,000 Initial Lumens- High Lumens- Longer Life Span 5485K Color Temperature- Optimal Vegetative Spectrum 77.9 CRI- High Color Rendering Index Recommended Use: With 1000 Watt ballast, 4'-6' above plants, covering a 8'x8' grow area, during vegetative cycle 1 Year Warranty Included