Unfortunately the newer lights have been found to be too bright for oncoming traffic, over here at least. I was reading the other day that the authorities are considering legislation, that previously wasn't needed.
That will only cover cars sold after the implementation though so we'll still have all the silly bright lights around.
100 watt bulbs were always an MOT failure, even 40 years ago but a decent mechanic would turn a blind eye.
When I was a spotty kid on a 'Onda 250 "Wetdream" I fitted 55 watt twin driving lights to the crash bars because the local MOT stations were being cnuts. Those were legal and brilliant (especially when old farts wouldn't dip their headlights for a motorbike) but the battery lasted about 10 miles :-(
Thatcher tried to introduce "dim dip" headlights in the 80s but the public and motor manufacturers didn't like them and wouldn't buy cars with them.
In the 2000s "blue" tinted headlights became fashionable because UV light causes white stuff to fluoresce (even if the blue tinted bulbs didn't actually emit any UV lots of muppets bought them anyway) but the plod were insistent any shade of blue, however mild, was illegal, and kids were getting pulled over left right and centre.
In the US the current DOT regulations are based on lumens not watts, but they equate (roughly) to 55 watt bulbs, but doesn't say how many bulbs you can fit... So you could also consider an LED light bar or LED spotlights hidden discretely behind the radiator grill or under the bumper. As I said previously, it's easy enough to fit a discrete switch and relay under the dash or even wire in a separate relay and high current circuit triggered by the front fog light switch.