Would some type of 12 volt "spot light" mounted high up & wired to your porch light work? You still need light behind the truck when your backing & it's dark outside, but by leaving the truck lights off, & blacking out the back-up lights & using this set-up, maybe ???
On the other hand, I know you said, "aside from a back-up camera" maybe a wireless back-up camera would work best. It could be connected to any 12 volt hot lead (porch light, interior switch). I have one ($55 on Ebay) & it has NIGHT VISION. No lights needed at all. It's clear as day behind me with all lights off. You may still need to do something with the back-up lights, when in reverse, but ?
