The old lighting fixtures in the motorhome where very cheap not to mention very outdated. We replaced them with regular residential style fixtures that use a twelve volt version of a residential style bulb. The old fixtures had the switches mounted on the fixture so I had to install switches to operate the lights. We also did this on a previously owed travel trailer and loved the look of the fixtures. In the travel trailer I put the switches on the fixtures and it was very confusing for guest to find the switches. So, I used residential style switches mounted in the ceiling; making them easily visible.