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To just add to Stick's comment, if you can add some 2700k warm whites during the first few weeks of flowering , it's easier on the eyes, and makes for better photos...plus the extra orange and red spectra boost flowering....but also consider going back to 6500k cool whites for the last week (while simultaneously hitting them with a 10.0 or 15.0 reptile UVB at 8" or so).
The latest thinking by the big commercial growers is that increasing blue spectra during the final week or two promotes trichrome and terpene production..similar to how in nature that the plants react to the change from "fall to winter" because the sun's color temperature becomes cooler, which instructs the plant to hurry it's ass up before it freezes....and the plants react to intense UVB by protecting themselves with a wonderful layer of resinous oils containing higher levels of THC.
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