I was teaching the guy at the LFS about lighting.. and he does know a lot.. we sorta feed off eachother which is mutually beneficial, I'll also help customers out when they are busy and the customer is asking a lot of questions.. Occasionally I learn stuff from people there aswell, I was talking to a guy there that reminded me that everything reflects back the colours they don't absorb. I had forgotten about that from highschool. So those red plants, they use red/blue(Chlorophyll) and contain another pigment that will absorb large quantities of green(Carotenoids are yellow/orange or red plants, Phycocyanins are blue/purple plants) which would lead me to believe to get things to look more red you would need to overload the red spectrum, but that would also make it look falsely red, so the mystery on that one is still not closed.. (but starving the clorophyll by nutrients will bring out the colours by dominance of pigmants but plant growth may suffer)
Yes, the 4100k will do fine for quite a while, just keep an eye out for algae which has always attacked my tank when I used strong red bulbs (2500k) but I don't forsee you having a problem.
Sorry for the speech there, just figure the more someone understands about what the plants are looking for, the more then understand about what is needed for growth.
actinic is borderline violet light (very rich blue). I'm still chewing over whether they have an effect on plant growth and what degree, their output is within the photosynthetic curve.