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Leds Vs Hps. $5000 Challenge


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a thousand bucks for 290 watts.... maybe just a good marketing /expense contest.?  nice looking led's, I'd try one for free in the grassmatch garden if they're reading. but two grams per watt, unlikely.  I still would need to take refractometer readings through the whole grow. Even the best led's didn't photosynthesize as efficiently as ones grown under hid or sunlight. 

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