Ok, Library shelving units are not known for being highly active, right?
And if you install a motion sensor for lighting, you tend to want to put it in an area of high activity, yes?
So, what genius put a motion sensor on the lights in the Library area, so if the shelves don’t move for 30 mins, the lights go off? I have to make sure to get up from my desk every 30 mins or less, to make sure they stay on! 
Sensor is (hopefully) being moved this week (I actually pointed this out before the move, but I’m just the librarian, what would I know about the activity levels of the library shelving…)
And yes, this means I spent yesterday unpacking and shelving 62 crates worth of library…I have many interestingly coloured bruises (knees and legs I understand, but how did I bruise my hand?!?), an aching back and shoulders…but the result is a lovely new library area! And that’s a mahoosive improvement on the previous library layout!
Today, I’m a happy librarian…who’s considering throwing her bookworm toy at the sensor instead of dragging herself out from behind her desk next time the lights go off…!
Dumpling in a Hanky 