This has been an incredibly interesting thread. I admit to going down the rabbit hole trying to understand light from LED's. I am conversant in PAR, PPFD and DLI now. Your measurements of PPFD and suggestions for DLI for different species are a great starting point. You have not commented on reflected light from light or dark surfaces other than to state that this light penetrates the canopy and that the increased distance from the wall to plant will reduce the intensity (1/d2), and I suppose would be added to the PPFD/DLI from your source. Is there any suggestions as to the amount of increase with a manufactured supplied PPFD at a known distance? And how do linear light movers play into this? (my integral calculations are a little too far in the past) Purchasing a 'PAR' meter would probably answer that question in my circumstance, but I am curious if anyone has any experience with these variables.