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here is a pic of one of my 600 hps with 2 units under them
(dont mind the bud in the middle..i was finishing some hempy 1 gallon plants before the new plants took off...free light lol)
i yielded 22 oz from 1/2 of what u see
if i keep up with this unit u see there is no reason i cant yield 40 oz total from it
this unit is about 2 weeks into 12/12....see the plants starting to flower
my romulus is about a 10 weeker
ps.....ive raised the light about 8 inches since i took this......damn things grow like crazy when u give the veg nutes for the first 2 weeks
greatest system on earth