I have a light switch indicator that is right next to the switch itself. It occupies one box basically. It has a very small bulb on it that screws on. The bulb on it died today after several decades and I said maybe its time I get something newer. Unfortunately all the indicator lights I am finding are integrated to the switch, i.e. they both occupy one slot. Thats all good in the name of efficiency but since I have to occupy a slot and I dont want a blank cover, it wont work for me.

Hi, I have attached a TV antenna to an exterior wall of our house and ran the coax through the door in the balcony to see if it works to bring in over the air broadcasts, and it does. Now that I know it works, I should set up a ground attachment for safety and need to penetrate one exterior location so we don't need to have the door open to make the connection. Thing is, this is the very farthest opposite corner of the house to the electrical service entrance, where the main grounding is. I've attached a picture of the situation. There is a lamp that I can open up in the balcony to connect ground, or I can run a ground wire down to the water tap underneath the window on the first floor and ground to the water pipe. Is there any other option to consider that is better safety wise? I tried to research NEC some but can't tell what is my best option. Thank you so much, and take care!