I'm interested to see what responses you get, I'm really curious about this too. I've read a lot of conflicting information in regards to light spectrums. Mostly its some people saying you *must* use a specific kelvin, and then on another thread I'll see pics of an awesome crop and they were using exactly what everyone said would not work… it makes it hard to know just how important it is.
I was just reading in the LED section where someone said in response to another members question, that it would be OK to run both veg and flower with just 3000k. I suppose its not optimal, but apparently it will "work". Just how much of a negative impact deviating that degree from "optimal" would have -- I'm guessing that might be hard to quantify.