imho, a fog pattern would be your best option in a rear light. it will give you a broader, but somewhat shorter, light pattern. as you won't be going fast at all, you really don't need the distance of a driving light, imho. i use a set of halogen fog lights mounted to the bed topper on my little ranger pu. they do very, very well. and i have them wired to a separate switch so i don't have to be in reverse to have them on. comes in handy when unloading the bed or lighting up a camping spot.
1966 CJ5A, mods are coming
1966 Wagoneer, bone stock