29,000 lumens 400 Watt Metal Halide Hortilux Blue - 29,000 lumens - 6500 deg k - 90criHORTILUX-BLUE METAL HALIDE HORTILUX-Blue Metal Halide lamps revolutionize lighting for plant growth. Designed to provide a balanced light spectrum that replicates natural sunlight. The exclusive Iwasaki/EYE chemistry provides levels of Red, Blue and Green spectral energy to optimize plant growth and yield. HORTILUX-Blue Metal Halide lamps are used professionally in plant physiological research, and biotechnology/pharmacology industries. Works with Sun System 2 400w MH, SS10 and Harvest Pro Elite 400w ballasts.