Looking for an RGBW LED tape option that lets me ADD white to a tuned color. The ones I have in my kitchen can tune a color OR white but not both at the same time. Is that the way the tape is designed? Or is that a limitation of my controller at home? The guy I just spoke with at superbrightleds.com said none of their products can do this which seems untrue to me -- they have too many products for that not to be possible. My designer for this show needs to be able to mix a color and ADD white if she wants to. We'll be running them off DMX help!