With motorcycles and scooters there's the incentive to bolster a lower output charging system and gain light when fewer HL's etc. are involved, plus the idiot factor towards those who pull out in front of riders so often.
With my tractor I'm in that retired and no dark work to speak of category, so I'll pass on this idea. Some incandescent's are really bright anyway.
Having replaced more than a couple of those "they last forever" LED's in home and two wheels, I recently read an article in the NYT's saying that LED testing which tell us these fantastic number of years and hours of LED life that explained how those long years are not real life applications. Fact is the testing is the LED emitters alone and not enclosed that yields these fantastical figures. Given the reality of those magic emitters always being enclosed, same as a tungsten filament and so on, it's now understandable to me why I've thrown away those so-called last forever LED's. They have their positives but the testing is un-realistic as was explained.
My SUV has LED HL's and they are really bright but honestly, I liked Zenons a lot too. Both are really pricey in OE version, not so much in Chinese stuff.