Maximum permissible wattage in USA headlights used to be 55 watts each (and probably still is). I don’t think there was ever a limit defined in lumens, so now we get LED lights with crazy brightness since they still use under 55 watts.
If the regulation isn't "55 Watts or equivalent brightness to 55W incandescent" then the regulation is pretty dumb. I mean it has to have a minimum brightness (regardless of power use), so why not a maximum brightness rather than a maximum power too?
I’m not sure if it even has a minimum brightness.
Anyone remember sealed-beam headlights?
My grandfathers 53 Chevy truck has them high beams or low beams, no one will be blinded by them