Xen-Lux Hydroponic Indoor Grow Light Bulb Lamp - 1000 Watt High Output MH - Metal Halide 1,000-watt Metal Halide (MH) bulb - 110,000 lumens Suitable for hydroponic and other growing systems Expected lifespan: 12,000 hours Color temperature: 4,200 degrees Kelvin Concentrated in blue area of visible spectrum