How far should my 400W HPS light be from my two pots? The seeds are germinated and planted but have not sprouted through the soil yet. Right now the light is 21inches away from the soil. Is that close enough to prevent stretch or should they be closer, and if so how close?

Thanks
JohnnyPotGrower Reviewed by JohnnyPotGrower on . Light distance...? How far should my 400W HPS light be from my two pots? The seeds are germinated and planted but have not sprouted through the soil yet. Right now the light is 21inches away from the soil. Is that close enough to prevent stretch or should they be closer, and if so how close? Thanks Rating: 5