Oh, I'm not dismissing your experience. It's got me, and probably a lot of other people thinking about this. But surely you are getting better with each grow. And you probably grow various strains. There are other variables in play, and we are talking about subtle things here. The thing I have difficulty accepting is that a plant that gets more light will have a smaller yield than one that gets less light. That's an extraordinary claim, and extraordinary claims require extraordinary evidence. I think it's an open question, and I won't jump to conclusions either way. Sounds like you have a lot of experience with the strains you are growing. It would be interesting if you made an adjustment to maximize the light during bloom on your next run. You should see either an increase in yield, or decrease. When you're accustomed to a certain technique, subtle differences become more apparent. That would carry a lot of weight in this debate.