1948 Desoto electrical issue

1948 Desoto still 6 volt. Driving at night a few days ago and all the lights suddenly went out on the car. The car did not lose power. It kept driving quite nicely. 30 seconds later the lights came back on. 30 seconds later the lights went back off. This continued for the next 10 minutes until I got home. The next day I started the car and let it run for 20 minutes or so with the lights on. Nothing happened. However, I put my hand on the light switch under the panel and noticed that it was quite hot. Is this perhaps a sign that my light switch is going out? Maybe a bigger problem? Also, if my light switch is going out, are light switches volt specific? Thanks.