@ape42 Thanks, this was useful to me.
For anyone looking to know which circuits to switch on for each of the lights, the event to use is "CIRCUIT SWITCH ON:" and below I've listed the Circuit numbers as well as screenshots of my SPAD potentiometer bindings for 3 rotary switches (increase side only, the decrease is the reverse to decrement but turning the circuits off is optional).
INSTRUMENT LIGHTS HARDWARE KNOB:
engine inst = 39
pilot inst = 40
copilot inst = 41
radio inst = 50
605898a5-df14-41c6-a490-6e8792d9960b-image.png
CONSOLE LIGHTS HARDWARE KNOB:
circuit breaker 90
pedestal 38
fdb8d621-e6c1-4749-9e99-63725e543f92-image.png
FLOOD LIGHTS HARDWARE KNOB:
pilot flood 36
copilot flood 37
c4b7d22d-a80b-4091-a0df-a4191e354fb0-image.png
One bit of strangeness that happens is the first time I turn the lights up with my hardware they go to full power. EDIT: Solved this by adding an extra line with higher priority to first sync the Potentiometer value to the LVAR (Glareshield/Panel) value. It seems MSFS Potentiometers might start fully on, but the LVARs will start fully off.
Also 2 other things I'd like to map but can't find how are the No Smoking and Seatbelt light switches. Not sure if these are actually functional though? But they do click into position and move, I can't see any lights in the cabin. However I do have 2 spare switches in that position so I wouldn't mind mapping them. The default Asobo seatbelt/smoking airliner events don't work.