I have ordered two Thinlite #193 12 v flourescent fixtures.  These use a single 18" 15 watt tube.   I plan to have Velcro attachments in strategic spots on the ceiling, each having a small 12v connector available.  With this I can place a light when and where needed.

The flourescent lights will give us greater light efficiency, important since we enjoy rustic camping.  I have also bought better light rendition tubes and will throw out the cool white bulbs that come with the fixtures.