Sunmaster® Green Harvest Metal Halide Lamps are effective in promoting both vegetative growth and flowering. They surpass many other HID sources in PAR watts - the most objective measurement of total light energy available for photosynthesis. Designed for optimal performance on electronic ballasts. SUNMASTER Green Harvest Metal Halide Lamps are effective in promoting both vegetative growth and flowering. They surpass many other HID sources in PAR watts - the most objective measurement of total light energy available for photosynthesis. Designed for optimal performance on electronic ballasts Balanced spectral output Promotes both flowering and vegetative growth Long life Specifications LAMP DESCRIPTION: LM.1000W.U37.4.0K SUNMASTER CODE: 80150-NA Rated Wattage: 1000 Base Type: Mogul (E39) Bulb Orientation: Universal Warranty: 1 Year Rated Initial Lumens: 110,000 Bulb Shape: BT37 Average Rated Life Hours: 12,000 HID Type: Conversion Color Temp: 4000K