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By certification 
1000 Watt 4000K Double Ended Metal Halide Grow lamp for Veg
Product Details :
4K bulb is a slightly warmer metal halide, making it suitable for both flowering and vegetative growth. Growers get the most use out of this style of bulb towards
the end of the vegetative stage.
Outputs UV spectra for enhanced resin production
5% degradation rate at 10,000 hours
High quality quartz glass for consistent spectral output and PAR production
Designed to prolong bulb life and preserve light quality
Lamp type: Metal Halide
Wattage: 1000 Watts
Style: Double Ended
Weight: 5 Ounce
SKU#: 115012
http://www.hpsgrowlights.net/
