Recommended · for some experience
Using LEDs as mains indicator lights on 120V and 230V (live demos)
Why people recommend it
Big Clive demonstrates several ways to run an LED as a mains indicator on 120 V and 230 V, recommended when resistor-only circuits overheat or reverse voltage harms the LED.
In their words
Watch this video and let BigClive show you what circuit to use:
Bimpelrekkie on electronics.stackexchange.com, Nov 2021. CC BY-SA.