I don’t know how it is in schools or industrial buildings, but in homes, by code (in Massachusetts) lighting and outlets cannot be on the same breaker. School janitors may not be allowed at the electrical panel, that might require a licensed (and since it’s a school) master electrician. They won’t work for less than about $100/HR, so it might be cheaper to just leave the lights on than have someone switch them on and off via the panel. I dunno.
I does seem crazy.
thx...
In many stores like in strip malls, there are no light switches. The lights are turned on and off at the circuit breakers.