Zumtobel's nBox is a group battery system that provides the necessary supply for emergency lighting in an emergency. In large buildings, this is an essential element that performs its service in tandem with the regular power grid. Which luminaire is allowed to light up when and which is powered by the battery in an emergency must be configured and periodically tested.
A sign can replace many words and is grasped intuitively. Even though a pictogram may not always be self-explanatory, the meaning is easily learned and can be grasped faster than the word.