Its not about the brightness, its about the design.

For any streetlight design, including the standard cobra or the "historic" looking lamps the city loves, the side facing the building can be shielded by simply using a thin piece of metal, as shown here

https://www.cloudynights.com/topic/618113-street-light-shielding/#

Of course the better option is to instead use a lamp design that properly lights the street and sidewalk instead of sending 3/4 of the light in the wrong direction (up, into bedrooms)

https://images.adsttc.com/media/images/620f/e040/3e4b/3104/6c00/0009/slideshow/fi2.jpg?1645207589

Just because something is bad now doesnt mean it is ok to get worse.