Whatever the results are from a given spectrum, the plants growing under them will always render slightly different results on every grow -even the same, exact genetics.
No one (outside of a huge, commercial grow-op) would even want to grow the same strain over and over and over again with no variability...and there is a noticeable variability among different genetics...so whatever a test result comes out to be for a given spectrum and a given plant, the results will be different for the next. One genetic line will respond to spectrum 'A' better than it will to spectrum 'B'. Another genetic line will respond to spectrum 'C' better than spectrum 'B' ....and so on.
These graph and chart 'wars' that happen all the time around here and all that comes of them is that people get agitated on one side of the fence or the other....and the plants don't really care.
It's hard to tell if an extra 5% increase in yield comes from a different spectrum....or maybe the grower just spent a little more time around the plants and they got a little more CO2.
The single-best lighting for different growth stages of all genetics is impossible to determine because everything in the organic world is constantly varying. And even if you could run the tests in a test laboratory with absolutely consistent environmental conditions, what would it determine? No one grows plants in laboratory conditions.
Get a good, bright light source within a reasonable spectral range (no yellow, fluorescent bug lights or black lights, xenon strobe lights, etc.) and your plants will do fine -as long as you pay attention and attend to all aspects of growing.