Heath, I think you do have it figured out plenty well. Your plants aren't suffering noticeably from the light you give them. I assume they flower about as much as you expect they would.
Problem solved!
Or, maybe if someone could propose the 2-3 most likely shortcomings of random light choices, you could set up some experiment to test whether your plants do detectably better after those (imagined?) shortcomings are rectified.
Or take away something and see if any plants get noticeably worse.
I think it is easy to show that most plants have some minimum brightness they need to grow optimally (and maybe during the winter, they need less brightness because they need to grow slower anyway). Take away the brightness, the plants grow slower and maybe etiolate (inter-node stretch = "legginess").
But spectrum? From what I read, the flowering phase is more likely to care about spectrum, so that might be the way to test what is insufficient.
