How strong are the actinics that you use compared to the light that is "pretty to the light"? Or maybe you use only actinics? In any case - how strong are then over what size tank?
I ask because 10 years ago I used a single 15W actinic bulb over a 30 gallon tank. It did nothing, absolutely nothing. I am guessing it was too weak.
Also it looks like playing with the light spectrum allows for variations of the leaf colors that we normally would not see. This is a tool really - a way to fine tune colors in an aquascape. Recently I posted about a strange coloration under blue LEDs - part of my Java Moss turned brownish-red. The leaves are not falling apart, so the plant is not rotting. But the color is closer to dark rust than to brown. Under a normal aquarium light (I guess 5000K) the color looks absolutely unique - like a Java Moss the color of a brown crypt. If the moss is indeed not dead but changed colors so radically this would indeed mean that one can use a strong blue light (or specific wavelengths) to play with the plant colors.