I have a 20" light bar that I bought on here from Nick last year and looking to remove it to put in some smaller cube lights.

Would the wiring from the light bar work on the cube lights?

 

Yes, should be fine. You may want to opt for a smaller fuse based on the wattage of the cube lights. You may need to splice a few cubes into the led bar line as well, but yeah you should be good if you are swapping out lights. PM me if you need options for cube lights, i sell all sorts.