Convert to 12 volt or not?

[woodrow]

We have a '30 Model A coupe that I've driven at night a time or two. The lights are pretty good with 6 volts, however I have been thinking about converting to 12 volt, adding a second tail light and turn signals. Seems that would make the car safer if I do get caught out at night. I'd sure welcome any thoughts on cost and suggestions on how to go about that. Thanks