My 1979 Fleetwood has only 12vdc lighting. There are 13 1141 size lights and one E26 over the stove. An E26 is the same base as a standard 12vac bulb, but this is a 12vdc bulb.
The interior is plenty bright now. I do plan to replace them all with LEDs for the power savings. Even the E26 comes in an LED version now.
The one addition I would like to have is a tabletop LED work light for working on small items were you need bright light. I have looked at a couple of battery powered ones but I was not impressed. In the meantime I am just using a headlamp.
I carry a propane lamp too--useful inside and out.
