I was down at Wally World last week and spotted a nice
desk/reading lamp that would be suitable for use in an RV.
It had a 12V DC wall wart with it so I cut off the wart
and put on a cigarette lighter type plug. It cost about $15
and works great for reading. However, the current draw
was a bit high for LED type lights
at about 0.8A for approx
10 Watt draw. It gets a tad hot but not hot like quartz
lamps so should be safer.