The efficient 600 Watt Sunleaves OptiLUME High Pressure Sodium Lamp emulates natural sunlight and promotes bud set, flower formation, and fruit and vegetable production as it distributes light energy concentrated in the red-orange portion of the spectrum. Universal design allows horizontal and base up operation while the 24,000 hour life rating and one-year warranty assures dependable performance. This high-output OptiLUME lamp emits 90,000 initial lumens and works with most 400 watt high pressure sodium and two-way HID systems