I've been working on some emergency/camping/survival LED lighting. 12 Volt.
Purchased some LED strip lighting off amazon, 16 foot rolls @ $6.xx bucks per roll. Very rubbery, silicone based covering, flexible, cut to length. 2 Inch minimum, every two inches you can cut.
shortest possible
@ 12 volts
placed in 3/8 x 3/8 aluminum channel. it's 3M sticky backed, but it doesn't stick well to anything. (probably why it's cheap)
power pole connections and lit up. Strain relief as not to pull apart at the solder traces.
Some LED lighting kept us going on a camping trip recently where the deep cycle battery failed during the trip. No amps, limited volts, but ran some LED lighting several hours to play some board games with the kids. Good stuff to have on hand. (built in lights on camper are 1amp each 115x bulbs) LED direct replacement lights are expensive. $20 bulb or so.
Built all this lighting for about $20 per 16 feet.