Reverse high beams have been installed on pick-ups, etc. for a long time. they are aftermarket and also illegal.
The nickname for them is: Asshole Lights, I can think of two reasons why.
1) to bright the asshole behind you.
2) Because it's on the very rear of the truck.

I only recommend it for non road use, trailer towing, etc.
B

__________________
----------------------------------------------------------

"When two people agree on everything, one of them is not necessary" - Arliss