Yield Lab 1000w Metal Halide (MH) Digital HID Grow Light Bulb (5500K) &ndash; 3 Bulbs &ndash; Hydroponic, Aeroponic, Horticulture Growing Equipment POWERFUL INTENSITY: Each 1000w MH bulb emits 110,000 lumens of intense blue light, more blue spectrum than other metal halide bulbs on the market. SEE THE DIFFERENCE: The spectrum of these bulbs is ideal for the seeding and vegging stages of your grow. Theyll help your plants build stem and branch strength to create a solid foundation for growth. REDUCE WASTE: A color temperature of 5500K is optimized to increase vegetative growth volume with lower temperatures, so that damage in the form of bleached or fried leaves doesnt slow down your growing process and create waste. MULTIPURPOSE FUNCTIONALITY: All Yield Labs HID bulbs pass UL and CE testing, making them safe to use for indoor growing. Plus, they are compatible with both digital and magnetic ballasts, so you can incorporate them seamlessly into whichever setup youre using. SATISFACTION GUARANTEE: We are proud to be an industry leader in grow equipment and stand by our professional grade products. Thats why we can promise a lifespan of 10,000 hours and offer a 1 year warranty against manufacturer defects. Available in 400w, 600w and 1000w Operated and tested before packaging High Conductivity Contact Optimized for high performance and effeciency Long lifespan saves you money over cheaper brands CE and ETL Listed Compatible with most ballasts Higher PAR Effeciency than fluorecent lights Affordably priced