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I have the $6 Walmart ones. Mechanical, 15min tabs grounded. Reliable so far but after a previous thread showing a melted one I'd say don't exceed the recommended usage.
Heythere cannatom if I we're you i'd go with the HLG 550 red or the Optic slim 600H. My last grow of 4 plants with the HLG 550 i harvested 19.3 oz off 4 plants. I am thinking to switch to the Optic and send my HLG to a friend who is using 3 Vipar 450's as it will save a 3rd of power and produce better results. just my opinion
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