I find the lights constantly going on and off as you move to be really disconcerting. The building I work in used to have that until they started failing, and I replaced them with normal switches.
There are a few good applications for those, like in closets or utility rooms. But it's annoying as fuck in an office space.
The closets were fine, but they failed as well. The place was built just as the green craze was starting, so everything was on occupancy sensors - all powered individually by little 24V power supplies, wasting power 24/7...
I can't even.
The best was when they started putting gardens and plants on top of roofs and overhangs. No one wanted to maintain any of it, so it became an eyesore quickly.
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