Hi campmuch,
With our 2007 2350, in an effort to keep the same fixtures to avoid scars about the rig, I affordably replaced only the florescent internals with LED strips. Though it was quite a project for me, we really do like the results, and at such a low cost. You can see many pictures and read about the project
HERE. We later determined the LED strips were just too bright so I have since disabled every 3rd circuit by removing their supporting chip resistors (easy to solder back) which also reduced power consumption even further. In the process, I also added an LED night light inside each fixture which we both appreciate.
I also replaced the regular incandescent light bulbs with LED equivalents for the closet, shower, stove hood, and outside porch & storage compartment. I estimate our lighting power consumption has been reduced at least 50% and the soft white LEDs provide a nice warm atmosphere.
I seek areas to improve on power consumption because we most often camp without hook-ups. I wished our power-hog 26" front TV would die so I could replace it with a 26" LED edge-lit TV for that would be much easier on our batteries. At the end of the day operating on battery power, we'll watch TV in the bedroom on our other TV/DVD combo for it uses much less power.
I also replaced our tired 12V batteries with a new pair of 6V AGM batteries in an attempt to improve power further. I have not yet seriously considered solar panels, just trying to find alternatives with things already in-place for now.
Back to the LED conversion. If you try what I did, you will need to be good with a soldering iron, and have some degree of patience. The first fixture takes a long time. The last one goes quickly.
Well wishes with the solution that works best for you, converting or replacing your fixtures.
Ron