Bob,
I assumed you would do that. My question was having a brake light in the same fixture with a blinking turn signal. In a more conventional setup, the light that indicates the turn is actually a blinking brake light and the entire assembly goes from dim (tail) to a bright blink (turn/brake) and is very obvious.
Won't your scenario involve a bright lamp (brake) immediately adjacent to a blinking lamp (turn). It seems this wouldn't be obvious to a driver from behind.
Stuart