Our '74 Argosy had backup lights. Our '06 Safari doesn't.
Evidently there is no industry requirement on this. Seems that more recently they've only been on Classics -- and I have no idea about transitional years, etc. Backup lights?
Honestly -- dimming through rear-view mirrors or the side windows on my truck cap is so bad, I think I'd have to have rearward pointing floods to help to any degree. Currently I can back up at night only if I jump out and go back to scope it out about every 5-10 feet of progress. The better alternative is if there is snow on the ground. Honest. Contrast and visibility is so much better!