i bought this as a gift for a fellow grower friend and his feedback has been pretty good so far. its apparently pretty efficient and runs cool and quiet. i was most impressed with the price of the product in relation to its quality, which is comparable to the Quantum brand that my friends got but I remember him paying over $200 for it. it has the same 3 year warranty, hopefully it will last until a better technology comes out. thank you seller for shipping my item in such a fast manner. 600W Watt Dimmable/Switchable Electronic/Digital Hydroponic Ballast'
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