I think the only issue would be if you are using DC 12v toggle switches and they will be lighted, especially if you are running command control which requires a constant 18 volts. Over time, that would probably kill the lights.
The solution is to integrate a diode into the wiring for the switch to lower the voltage to the light.
I believe Chuck shows a 2N4003 diode wired into his switch in his schematic, shown above.