They actually are just manual interior lights, they are either on or off and controlled with the smoke unit buttons.
I am thinking more of a wiring setup like this:
The setup for the headlight will be for each A end of the engine, and the cab lights would be directional with the headlight. The marker lights will be connected to the original interior light bulb wires/connections and the original incandescent light bulb in the middle section will remain, so that should allow the triacs to activate for the smoke unit output. All the resistors will be 0.5 watts, so they will be a bit cooler.
