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400V Bulbs

400V technology is an update and improvement to the standard 240V HPS bulb used by growers around the world. The lamps can emit up to 10% more usable light (PAR), and as you would expect from a premium standard full spectrum bulb, the light generated by this advanced technology triggers phenomenal growth in all your plants over both vegetative and flowering stages. This is a great option for those looking to upgrade their light set up but not want to veer away from the all to familiar HPS technology. These lamps do require a 400V ballast to operate.
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