same as someone said earlier - 16mm ally channel from bunnys.
this is how to make your own led light bars -
make up your lengths of lights, and cut channel to suit. use sandpaper to smooth off edges at both ends, so there is no rubbing on the lights.
sikaflex or whatever down the channel - lay and lightly press light in channel so it sticks.
buy length of xmm (think I got 100mm) pvc pipe from said bunnys and ensure longer than your longest led length, with end caps - permanently stick one end cap on (sikaflex/tape whatever).
use this to store and carry around your new led light bars - can't be lost or damaged in the camper/truck/wherever.
go to fleabay - buy packs of 10 hook and loop Velcro strips - I paid just over $2 per pack of 10 delivered from hong kong phooey. yes, just $2!
mount the light bars wherever you please and when going home, simply pack away in your pvc storage pipe with Velcro strips for next time.
I've made up a fair few, some small lengths for the shower/toilet tent etc, and some longer for inside tent etc. I have 10m extension power cables for mine, so I can easily pick up and take outside if needed.