It took about 7 days (if memory serves me correctly), I remember it was quicker than their advertised '10 days'. I believe quality is actually better than HPS (in my experience, anyways). I am chopping on the 16th (Thursday) and will do a weigh-in after drying. I have nothing to compare it to, so I can't really say if yield actually suffers. My buds are DENSE!!! When I move around and cause a gust of wind, the nug will like slap the shit out of my SAD and I am afraid my TD will hurt my SAD. WAY denser than anything I have yet to grow with HPS. Remember, I veged them with a MH and I heard the real advantage to LEDs is what they do in veg that allows for such beautiful, strong plants. I have NO popcorn bud and haven't done any pruning at all (only 2 fan leaves, but no bud sites). Upon further review, Due to the density of the nugs, I am now inclined to believe that yield is not an issue. But as I said before, I have nothing to compare to, if I ever grow a TD under HPS, I will know for sure. And when I say yield is low, I'm comparing myself to guys like Seymour buds and Hazey, realistically, I would have never yielded anything close to those guys with even a 600w HPS. I tend to be harsh on myself and set high expectations. I think you will be extremely happy with the yield and be so happy with the quality that you may shit yourself. When I look at my nugs, I jump up and down like a child and get all excited. My pictures do not do it justice in the least bit.