Salutations MuleSkinner,
Based on my limited understanding of this complex subject i’d expect a mix of specific and generic, for example:
[ Chlorophyll "2-Level" Ionic Pump - Hledat Googlem ]
Google Images: Chlorophyll “2-Level” Ionic Pump
…
This schematic below is about Chlorophyll more specifically, not in cannabis only. It appears to illustrate why the double peaks at 680 and 700 nm based on an analogy to resonant “antennas”. Eventually additional hints are gained, like the 559nm peak and the names of dedicated researchers, for example:
[ https://www.google.ca/searchq=Photosynthesis+Antenna+Calvin+Benson+680+700+550+559&tbm=isch ]
Google Images: Photosynthesis Antenna Calvin Benson 680 700 550 559
So i suppose using similar Googling tricks one might find more useful information to help in narrowing the searching parameters somewhat, which wouldn’t hurt a bit trying to find our way through such jungle!..
Good day, have fun!! 