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  1. R

    Standard mh/hps bulbs vs grow mh/hps bulbs

    First post I've made here. Something has been puzzling me recently. Particularly regarding grow lights. I've always used a 600w magnetic ballast and dual spectrum before moving to a mh/hps setup. All were shop bought grow lights, powerplant Sylvania, etc etc. Now to my query. I've recently...
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