I really like my two IPF backuplights. They are solidly made, have glass lenses that create a wide dispersion pattern for the rear of your truck. The wiring harness and relay can easilly handle two lights together, and has the switching like one of Coolermans kits (reverse always on, reverse off, reverse light on only when in reverse).
http://www.4x4connection.com/tech/ipfdirections.htm
www.4x4connection.com