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not to answer for someone but i believe he is refering to lumen output per watt.
swim says 4 plants in that amount of space , esp. since u mentioned using square containers , this will help with utilization of space(or the...
How's that A.I. doin? She should be somewhere in the 13-15wk range now yes ? thats quite the long lady . I was hoping for 9wk like GH reported..
6500k is most definately for your "vegging" There should be a large disparity in growth , but as swim hasn't ever tried to veg under warm light...