Very interesting, just by eyeballing the spectrum graphs it looks like the gen 6's have more blues & greens in exchanges for some reds, you can clearly see that the cyan valley isnt as deep as in the gen 5 graph, for the 3500k the cyan/480nm bottoms out at 32% for gen 6 vs 22% for gen 5 and in addition the greens are also higher for gen 6, could this be why the par meter shows a higher reading for gen 6? since green and cyan are still part of the PAR spectrum it measures higher since the increase in greens and blue came in exchange for far red that the PAR meter might have not been registering in the first place? where is the PAR meter cut off? 700? 730?