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Thats funny I was just reading that last night, it is a good read and it sheds some light on the LED manufactures BS. 

The question I cant find the answer to is how deep do the lights penetrate? So they put out 600 ppfd at X height from the top of the canopy, what it is at 12 Inches below the top? Seems like SCROG's and short SOG's  and LED's will go well together.  

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