My garage is attached to the house with a 3-way lighting circuit. Sometimes the family leave these lights on and this is only discovered when someone goes outside and notices the fact. One of the light switches is inside the house (next to an internal door into the garage) while the remainder are at either ends of the garage. I'd like to add an indicator to the indoor switch to show when the lights are on. Because it's a 3-way circuit, I think I need a new cable from the lights to this switch. It's a single gang box but I am struggling to find a switch with neon indicator that is fed separately. I'm sure this is all achievable using a modular faceplate but frankly I'm hoping to avoid the expense (of modular).
I am hoping someone can confirm I need to add a new cable for this, and suggestions for a switch+(separate) neon indicator faceplate ?
Thanks Paul