I had two LED Cube lights on the back wired into my reverse lights for better lighting and it looked awesome. I ended up with another few sets after I took my bullbar off the front of the truck, so decided to add two more on the back. Total of 4 back there now. Let me tell you, it was bright as hell with just two, but with 4 it's insane. Here's a shot I took last night. Again, these are my reverse lights

 

WOW...almost looks like too much light...but wait, I don't think that can be possible.

 

you may even allow the blind to see with that. wow