I had some bad experiences with LED lighting in our RV around 2005. We were preparing for extensive boondocking and wanted to save power everywhere we could.
Since then products have improved. I haven't tried LED lighting in our current RV, however I have several LED products that perform wonderfully:
Flashlights: My wife and I both carry Streamlight mini flashlights and they are awesome. I use an LED dive light that is twice as bright as a comparable filament bulb light and I'll never go back!
LCD screen backlighting: The LED backlighting in my laptop and HDTV is excellent.