And there's even a problem with that: A number of avionics units have a photocell to automatically dim as the ambient light decreases. Several of these, at least, are sensitive to red light and therefore don't dim when the red flood is on. I've solved that problem by taping a little piece of green colored plastic film over the photocells.
Roy
The install instructions and instructions for continued airworthiness caution against using the unit to deal with modern Avionics lighting. The supplied wiring diagram shows clearly the intent of the dimmer is for the original incandescent panel light setup.
