Now you can make your custom pedals pop with this built-in in-use LED 3PDT switch. Available with single Red, Blue, Green or Violet LEDs and bi-color Red/Green or Red/Blue LEDs. Recommended drill size for washer is 11/16" diameter. Rated 2-3V, minimum resistance of 470 ohm recommended with use of 9V power supply. 3A 250VAC
Very cool idea! Be aware, this requires a chassis hole of 11/16'' for the LED bezel, which is much larger than the 15/32" hole size typically used for a footswitch and probably larger than any bits you have on hand (such as in my case). Also, the LED polarity is not indicated in any visible way.