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I know I prob need to get a nicer light and ditch all the crap lights but for now I have what I have. Perhaps after some success I may be able to get a new light to replace all of them. But how far should it be? 2 feet above rockwool cube? And what watts per plant
I would also get a LUX or PPFD meter, easily downloaded as an app. Maybe not 100% accurate but you can get quite a good idea on where the light should be. Hope this helps