(PRIOR TO READING, I SUGGEST YOU LOOK AT THE IMAGES AS IT WILL MAKE THINGS A WHOLE LOT EASIER TO UNDERSTAND)I purchased 2 neons from Repco. That run off your cigerette lighter with an adaptor. They worked fine, until my friend got in my car, and accidentally dropped something on the adaptor which caused it to malfunction, and bam, my in-car neons (placed up under the dash, near where your feet rest) went out.
wire is wire. If it really is silver then theoretically it should conduct electrcitiy better than copper. But that doesn't really matter much. wire is wire. all it needs to be able to do is carry the electrical current. If wiring truly is your problem, then that will work fine.