I did - and did what it looks like OurJayco did. I did some searching and found a few threads like his that explain how to do it.
I bought these on Amazon for $30 CDN https://www.amazon.ca/ALED-LIGHT-Con...d+strip+lights
Remote controlled, multi-color.
I simply removed the 120V transformer and connected them directly to my 12V power, which I tapped in to behind my Battery/Grey/Black/HWT switches in my 26BH. Drilled a small hole in the side of the trailer to get wires in, and sealed it back up.
They work great and have handled a year in the elements without issue. I think I was all in, including supplies to 3M double-sided tape them up and control cable (I used flat phone cable - cheap and easy) for about $45. Oh, and about $10 for a six pack of beer while installing