6 volt or 12 volt

[joe 1950]

Good morning fellows i’m from the 50,s part of the barn i’ve restored a 1931 model A some time ago and have worked on a few model T my ? is one was converted to 12volts and one is 6 volts both vehicles are 1925 model i was told years back from a good friend that a lot of owners convert to 12 volts for better starting and brighter lights just like so many of us with 6 volt cars do just would like your thoughts on this thanks Joe