Ushio US5001671 Enhanced Performance HPS Lamp, 1000-watt, Opti Red 400W, 600W, 1000W SUPER high output HPS with maximized output in both red and blue spectral range SUPER HPS bulb with maximum output in both red and blue spectrum Runs on HPS Ballast Optimized for maximum flower yield and added blue spectrum for vegetative growth efficiency Each bulb is test fired at the factory prior to leaving the factory. Bulbs may look burnt.