Most run a 50 inch led bar on a full size pickup something smaller like a jeep a 40 inch will do.And do your homework on led bars before you buy one,The cheap ones are cheap for a reason they suck at light or are not water proof and fog up over time.Cheapest i would run are
http://olympusoffroad.3dcartstores.com/ http://www.inspired-engineering.com/default.asp If money don't matter
http://www.bajadesigns.com/ and
http://www.rigidindustries.com/products