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By certification 
1000 Watt 6000K Double Ended Metal Halide Grow lamp for Veg
Product details :
6K bulb is the best bulb for plants in the vegetative stage. The 6K lamp emits a cool blue light, matching the color of sunlight in spring time. This color
of light typically encourages short inter-nodal spacing and bushy plants.
Mimics spring time light, promotes short inter-nodal spacing
High quality quartz glass for consistent spectral output and PAR production
Great for commercial applications where a large vegetative footprint is desired
Lamp type: Metal Halide
Wattage: 1000 Watts
Style: Double Ended
Weight: 5 Ounce
SKU#: 115013
http://www.hpsgrowlights.net/
