thanks again. I'm good at light in physiology but not a specialist on light sources. And electron flow imparements was smth I didn't thought about before I know what sensors drive photomorphogenesis, and wanted to confirm what I thought, that in vivo they react quite good also to somewhat shifted wavelenghts, thn for your opinion. Anyway, imo, of course, photons quantity are very important, but quality counts indirectly via driving morphogenesis. So better to say cannabis is not 'almost insensitive', it probably just less sensitive/needs higher ratio of red to green and blue than more shade loving plants. But it's only the issue of formulating words for what you of course already know, otherwise you would propose pure red, while proposing some blue and green to treat stretching, stomatal and other responses
Well, a propos green light, I guess it could be possible to reduce GL if adding FR, becuse leaves probably would grow larger and thinner under FR supplementation.
Nice you want to help with buying..but I can't send you a PM