Yes, false correlation is the single most insidious flaw of this hobby. There are many variables which contribute to plant health, and indeed the health of the tank as a system. You can do something today and not see it's effects for a week, the day after you do something completely unrelated. It then becomes easy to blame the unrelated action for the effects observed. That's why we have to adopt the mindset of being systematic and to question the results until we can reliably and repeatable produce those results to draw valid correlation between cause and effect.
Frequency is the inverse of Wavelength (F=1/W and W=1/F). Blue light has a low wavelength therefore it has a high frequency. The energy of radiation is inherent in its frequency, which, when you think about it make sense. The more frequently something hits you the more damage it will do. As the wavelengths get shorter (frequency gets higher) you'll find that we move out of the visible spectrum and into progressively more seriously damaging radiation. UV then X-rays, then Gamma rays which will fry you to a crisp, even though you can't see them. A photon energy packet rides on each single wave, so a single ray of green wavelength, say of 500 nanometers (500 X 10E-9) would deliver about 2 million photon packets per second, but a single ray is actually composed of two individual rays which are perpendicular, so this means 4 million photon packets per second per ray. When you increase the wattage you increase the number of individual rays. The way that a plant "sees" light is not as a continuous "glow" but as a cosmic hailstorm of photon torpedoes and at the same time as ocean waves crashing against rocks. Too much light actually can cause damage and can curtail photosynthesis. This is called photoinhibition.
As far as the apparent Kelvin temperature, check that APC link again at the C.I.E chromacity space map. You'll see that as the theoretical black body heats up, the color changes from a red glow, to white hot, to blue hot. So red is a lower Kelvin temperature, a lower frequency (higher wavelengths) and thus a lower energy level, while blue represents a higher energy level, a higher frequency (lower wavelength). So a 10,000K bulb should appear whitish/bluish, which is consistent with the higher blue/violet/cyan space depicted on the spectral graph you provided. Whether the bulb will actually show that is another story, but that's what is should show theoretically. Again, for the marine reefer types this probably has much higher relevance since their symbiotic Zooxanthellae, which do photosynthesise are finely tuned to specific spectral qualities, or at least their visible pigmentation is. Whether this has an effect on food production I can't say.
In any case, yes, that's all I did was to look at the relative color areas and then to take a stab at what it ought to look like.
Hope this makes sense.
Cheers,