[GulfCoastAquarian]

The green spectrum is just there for us to see the fish. Think of how dim your tank woudl look with only red and blue output (ever look at a reef with actinics and red moonlighting? the fish can sleep in that light.)
If they had little green output, their lumens rating would be nearly zero. Normal bulbs have a green spike easily twice as tall as their red and blue spikes (if they have a concentration in red or blue areas at all). A good balanced tri-phosphor bulb has always been the ideal choice for plants.