Elfin Growth Hydroponic High PAR Enhanced Red and Orange Spectrums 1000 Watt Flowering High Pressure Sodium HPS Grow Light Bulb Lamp Ultra Bright 140,000 Lumens Optimized spectrum and high PAR (Photosynthetic Active Radiation) to promote healthy plant growth. Lifetime: 20,000 hours/ 2.3 years. Extra-low lumen depreciation: maintaining over 90% of initial lumen output after running for 5,000 hours. long lasting life with a high lumen output and low energy consumption Stimulates flower growth and enhances fruit production