I'm working on an unusual project and need to decide between mounting a red LINZ6 on top of a blue LINZ6 or just using one 400 series red/blue lighthead. I realize that I will need a ULF44 flasher with the 400 series. I'm probably going to use one either way though, so I can dim the lights if need be (unless there's another way to dim LINZ6s). Anyway, what are y'all's thoughts on those two options (and the dimming issue)?