Cowgod, that's kind of what I was envisioning, and seems like what I'll end up doing. Now to find a place that sells good looking switches like that

It's been a long time since my studies in low-voltage electricity, a LONG time (obviously too long).

Lithium, looking at your example, if both 12v sources both become live (i.e. doors open and fuel the 12v switched source, AND the switch is on with the constant 12v at the same time) would that double hte voltage goign to the neons? Does voltage add up in a circuit like this? If so, I'm thinking that might toast those neon tubes' transformers

Been too long since I did something like this :/ sorry for the noob questions