iPower 1000 Watt High Pressure Sodium HPS Grow Light Bulb Lamp, High PAR Enhanced Red and Orange Spectrums CCT 2100K, 6-PACK HIGH LUMEN OUTPUT: 140,000 Lumens output, compatible with electronic and magnetic ballast, E39 Base SPECIAL DESIGNED FOR PLANT GROWTH: Designed specifically for Professional Hydroponic Plant Cultivation. CCT 2,100K, Optimized red & orange spectrum and high PAR (Photosynthetic Active Radiation) to stimulate flower growth and enhance fruiting EXTRA-LOW LUMEN DEPRECIATION: maintaining over 90% of initial lumen output after running for 5,000 hours EXCEPTIONAL BULB LIFE: 24,000 hours. New long lasting life with a high lumen output and high power efficiency. 1 year warranty NOTE: allow 3-5 minutes for full bright. Please wait at least 5 minutes after power shut off before striking again