How often do you read a label before switching on a light? I work at a building that has a big panel of them, and I still just flip them on and off until it loo

How often do you read a label before switching on a light? I work at a building that has a big panel of them, and I still just flip them on and off until it looks right rather than read the label. When it's a matter of handed-or-maimed, don't rely on a label!