Stopped in at the local Lee Valley yesterday where they had a demo table set up displaying their new line of 12 volt LED strip lighting. Looks pretty promising for trailer mods..... Comes in warm white as well as a coloured strip which changes colours to what ever you set it too (including just white) for your desired mood lighting. Comes with a dimmer switch or a choice of separate remote dimmer switch. The light strips can be trimmed to what ever length you want and you have a choice of mounting options.
I know better, but I can never walk out of that store without dropping a hundred bucks or so.... LED Channels and Diffusers - Lee Valley Tools