Go to Amazon or Ebay and search for 12V Led, you will get all kinds of options, the 12V ones, yes you can hook straight up to your DC system, or run a dimmer.
My preference is for "warm white" I don't like the bluish tint many LED's have, but they are so cheap
you can order a few different ones and go with the ones you like.
I put them in the Salon
with a dimmer, wife didn't think she would like them but does now, Daughter calls them Limo lights
I didn't go with the rope ones in plastic, I used ones that are ribbon like and have a self adhesive
backing like scotch tape. Don't like them? peel them off and throw them away, nothing permanent.
There are also wireless dimmers that are real cheap
and connect into the power wires