Hey Ham. Im not an expert either but my understanding is that the higher blue spectrum will travel deeper into your tank. Thats why 10,000-12,000k are more ideal for coral. The light tends to have to travel further into the tank and coral mainly gets only a blue spectrum in their natural habitat. The red spectrum depletes much quicker as it passes through water. So if your lights are 6500k then they will peak more into the red spectrum and you will have more red and blue waves feeding your plants. But as long as the distance between your lights and plants isnt great, your plants should get a healthy dose of each wave. More dominant blue spectrum will breed bushy slow growth and red will breed fast sparse growth.
Good luck luck to you Ham86. Keep us posted.
from a marine stand point this is fairly accurate except to add: as a point of clarification.
the 10k 12k bulbs containing less red light are less likely to promote nuiscance algae kelp growth in a marine tank. But to simulate shallow water 0-3 feet deep (tidal zones) in marine water 67k bulbs are used as the depth of water gets deeper, more of the red spectrum gets knocked out, simulating 3-30 feet requires 10k or 12k (all the red and most of the yellow has been knocked out of the water at these depths),green light penetrates all the way down to 150 feet to simulate Deep water 150 feetand beyond blue is needed since ONLY blue light penetrates that deep. which in this case would primarily be actinic bulbs, 420-460 nanometers, which strangely enough is a photosynthetically active wavelength.
the only time you really have to worry about light spectrum penetration is if your tank is over 3 feet deep.
for maximum plant growth you want 67k or 55k bulbs since they tend to contain the highest PAR. Par is the measurement of the amount of photosynthetically active wavelengths in light. So the bulb that contains the highest wavelength is going to contain the most wavelengths of photosynthetic light. And here is the surprising part for most people: the best light for promoting fast coral growth is also 67k because it has the most PAR.
Maximizing par is great up unto the point of photo-saturation after reaching photo-saturation adding more light is superfluous, any photosynthetic plant or algae can only utilize so much light going beyond the amount it needs does nothing more for the plant or algae.
(i'm running off memory here and its 5 am so if I mistyped something don't be shocked)
"[Wabi-sabi] nurtures all that is authentic by acknowledging three simple realities: nothing lasts, nothing is finished, and nothing is perfect." -original author unknown-
125g marine reef tank, 6 gallon fluval edge minimalist aquascape (in progress), 1 gallon aqueon evo 2 betta tank.