SPL Horticulture Stmbd 1000 Hydroponic Double Ended 1000w Watt Metal Halide Mh Grow Light Bulb Lamp for Magnetic and Digital Ballast Features high red-orange spectral ratios for great photosynthesis efficiency and healthy plant growth. Initial lumen 80000, Color Temp 4200K Horticulture 1000-watt Metal Halide MH Double Ended Grow Light Bulb Specifically designed for high frequency electronic ballasts. New improved horticulture lamps that use super high output technology to achieve maximum vegetative growth and maximum flower yield. New long lasting life with a high lumen output and low energy consumption