There are solutions to institutional lighting spillage. The local planning commission may be of some assistance. International Dark Sky, too.
"local planning commission"
thanks for the chuckle - this might be a "city" in political terms, but it is low-pop and dirt-poor.
there's really nothing the hospital can do/afford to do, short of yanking the new lights.
my blackout curtains suffice for my preference for deep darkness for sleep, and the bulk of the house will at least shadow the back yard once I get that shield up on the other light source.