I have heard the SAME thing. what is the deal with uvb. As far as the CMH during flowering. I talked to someone who said that alot of blue light is really bad due flowering because it blocks the production of a cetain chemical in the plant that is neccesary during flowering. The bulbs were made to make things look different to the human eye not to grow plants! i dont think that it can be any better then switching between MH and HPS for dif growth cycles. But i want to know what uvb is because if i can up the resin probuction by changing somthing i would love to know

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