Everywhere in our new office there are high-tech light detector systems so that the lights will only be on if somebody is moving about.
The toilets and other public-facing rooms have signs saying "please keep the door closed so we can save energy".
But because the lights *always* come on when somebody is moving, they come on anyway even when the room is very bright due to the direct sunshine (wall-to-wall windows, albiet frosted in the loos).
How rediculous.