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Reply to "SPST Toggles W/LEDs"

I use these auto type switches. They are rated at 12 vdc and that matters for the LED. When you apply 18 vac, the LED rectifies the AC and the half wave rectified voltage equivalent is about 12 vdc. Also it is advisable to put a diode in series with the ground terminal with the arrow pointed to ground or common. You can connect all the ground pins of all the switches together and just use one diode. 
These switches also have the issue of the switched terminal getting connected to the ground pin when the switch is off.CaltermSwitchCaltermSwitchWiring

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