There is something called photonreturn where two bulbs side by side can cancel each other out and can shut off the bBetter if they are end to end. Dont have studys to support it and it was studied in alaska. A very wise grower told me who is I think the president of the general Hydroponics store chain and has a distrobution company in cali. Regardless he is a genius.
Chris Seekins Reviewed by Chris Seekins on . Flowering 400W MH and 400wHPS LOG Tell me what you think of this flowering start and how much better or not it is to flower with both. Any input on this is helpful i thought i heard a couple times that both are better than just an HPS so tell me your input on this. Rating: 5