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Thanks Weed, one thing I need to add is the coverage is at the hight of 24inches above the plants. So during veg, the light will perform great, however, when do flower, you need to consider smaller coverage, thus bigger lights will be alwasy the better choice.No problem man. Id do just the 1 1200w instead of two 900w now if your area was 4x8 id say rock the 2 900w but in a 4x4 the 1200 will grow some fat buds.
900w covers a 4x4
1200w covers a 4.6x4.6 area.
