i have never flowered under the emerald green mammoths but imho there are a gimick. "normal" led's already have ample green i the spectrum, there is nothing to be gained by adding more.
like rocket says the only benefit of mixing different kelvin strips is if you are going to run the 2700k and 5000k on different channels. but to do this properly you have to oversize your light a bit, hypothetically if we wanted to build a 2 channel light for a 4 x 4 tent that gave us 1000 ppfd...
i have changed my mind i think mammoth are using monos for the greens, been having a play and can more or less recreate mammoths spectrum. it uses samsung mint evo + samsung lm301H evo 3000k + samsung lmb301B 5000k + osram 660nm + osram 730nm + 525nm(green).
but it only comes out at an...
i believe the evo is a 437nm pump, im sure i have read 437nm somewhere in samsungs literature but its also a perfect match for this - hybrid InGaN/AlGaN-CuI blue led, (not from samsung).
there is nothing in either of those papers that suggests adding additional green light to a "typical" white led spectrum is a good idea.
the first paper mammouth quotes from is using halogen as the white light source not led, halogens spectrum is extremely red heavy with medium/moderate amounts...