I just installed an RGB LED strip to my MH:
http://www.dx.com/p/waterproof-72w-3600lm-300-smd-5050-led-rgb-car-decoration-light-strip-w-rf-controller-227310#.U4yHImco9hF
Thanks to recommendations in another thread to use the kit with the RF remote so the IR controller doesn't have to be mounted outside in the weather.
I drilled a hole in my siding under the awning and pushed the power cable into the cabinet above my bathroom sink, and wired it through the ceiling to the bathroom light. Used a dab of silicone to seal the wires through the hole.