I have made some real progress in figuring this out. As unlikely as it seems, I need to give plants in flowering more water. I started add a little peat moss to soil to bring the acid level up. That works great but it makes the soil more absorbent. I harvested one of my plants yesterday and was surprised that the root ball was much smaller than usual. There was way too much dryness close to the bottom. I am guessing that since LED lights are more efficient, they probably draw more moisture out of the soil than CFLs did. New plants going into flowering are going to get a lot more water. The original concern was that led lights were working extraordinarily well in vegetative but made no difference in flowering. I am betting that more water will make a lot of difference. I can see that some lights would work better in vegetative than in flowering but a huge difference is not realistic. Anyway, I am going to try going with more water since what I was doing was inadequate.
