I've looked into this a lot for my F150 as the reverse lights are indicators only...at best. I've seen a lot of people who swear this LED or that LED made a difference, but given that the reflector/housings are pretty lame I'm hesitant to drop $20-$50 for a set of led bulbs (plus, what about heat soak?).
Best solution I've seen in the auxiliary led lights out there. I would bet you could find a nice balance between light output and power usage to allow you to tap directly into the reverse light wires without any extra wiring. I haven't done that yet as I don't like the idea of extra lights hanging down from my bumper- and I just don't need them that badly. If I did more trailer hook ups at night or whatever, then it would be done already.