Here's my camping light setup.
I originally bought a LED light strip of eBay for some 15$ to place under the awning. It gets attached to a cable fed through the rear sliding window but also has an illuminated switch on the inside. Connected via anderson plug.
That used only half of the 5 meters so I decided to stick the rest into the boot. I've placed it around the door opening on the inside so that it doesn't blind me but illuminates the cargo area. Again with an illuminated switch.
Then I had some 30cm of LED strip left which now makes for good light in the roof top tent. I simply taped it to the central pole overhead. The cable runs along the pole to where the mattress begins. Again with a switch, this time dangling freely like on normal lamps at home. Power comes from another cable fed through that sliding rear window and through an existing opening in the tent. Connection is done via anderson plug and I added a second one for accessories (I always find out I need to charge my phone when I set the alarm...)
The last light you see is a LED spot light in the kitchen so that I see what I'm cutting. It's from http://www.brightlightautoparts.com/index.html eBay store.