These panel-mounting rocker switches have built-in indicator lights to let you know when your switch is engaged. They mount into a 20.2mm diameter hole and are rated up to 16A @ 12v. These simple SPST on-off switches have three terminals, the two that you would normally see plus a ground tab for the blue LED lamp inside. Although these are rated for 12v, the LED works with as little as 5V. https://elecena.pl/product/2827405/rocker-switch-round-w-blue-led 2012-04-27 https://elecena.pl/product/2827405/rocker-switch-round-w-blue-led 2016-11-25 https://elecena.pl/product/2827405/rocker-switch-round-w-blue-led 2016-11-28 https://elecena.pl/product/2827405/rocker-switch-round-w-blue-led 2016-11-29 https://elecena.pl/product/2827405/rocker-switch-round-w-blue-led 2016-12-09 https://elecena.pl/product/2827405/rocker-switch-round-w-blue-led 2016-12-13 https://elecena.pl/product/2827405/rocker-switch-round-w-blue-led 2017-11-24 https://elecena.pl/product/2827405/rocker-switch-round-w-blue-led 2017-11-28 https://elecena.pl/product/2827405/rocker-switch-round-w-blue-led 2018-05-05 https://elecena.pl/product/2827405/rocker-switch-round-w-blue-led 2018-11-21 https://elecena.pl/product/2827405/rocker-switch-round-w-blue-led 2018-11-27 https://elecena.pl/product/2827405/rocker-switch-round-w-blue-led 2022-02-21 https://elecena.pl/product/2827405/rocker-switch-round-w-blue-led 2025-04-11 https://elecena.pl/product/2827405/rocker-switch-round-w-blue-led 2025-04-14