Hortilux 360W HPS conversion lamp operates on a 400 watt Metal Halide ballast. The Hortilux 360-Watt Ultra Ace HPS Conversion Lamp is designed to operate on a 400 Watt Metal Halide Ballast. The lamp emits 45,000 lumens and is rated at 24,000 life hours. This universal bulb can be run in any position and it has a temperature rating of 2,100 Kelvins. Hortilux lamps to raise your lighting system to a new level of performance and optimize spectral energy levels to promote vigorous plant growth. EYE Hortilux lamps are designed with exclusive chemistry and technology that set new standards of plant lighting excellence. New EN designation indicates that these lamps pass EPA, TCLP test criteria as non-hazardous waste, which means they are better for the environment! The 360 watt Eye Hortilux enhanced performance light bulb emits an amazing 55,000 lumens of illumination and has a rated life of 24,000 plus hours.