I like your style!
The added complication is that I am renting, but I love the wall idea
I have a huge ancient hills hoist, and a chook pen with 10ft high steel posts, I can probably rig up some sort of light shield. The monster tree on my eastern side (lights are on the western side) really does reflect a lot of light back into the yard unfortunately.
Maybe I can train the possums to unscrew lightbulbs...
I'll try offering to pay for sensor lights, and see what happens.