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Amazon.com: iPower Horticulture 1000 Watt Digital Dimmable Electronic Ballast for Hydroponic HPS MH Grow Light with 200pcs Cable Tie of 8", 1000W : Everything Else
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Amazon.com: VIVOSUN 1000 Watt Dimmable Electronic Digital Ballast with Enhanced Internal Cooled Fan, 25% Less Heat Generated and 15% Longer Service Life : Patio, Lawn & Garden