One switch at the exit turns off all the lights in the building, preventing forgotten lights.
At the exit of the building, a single switch is installed that turns off all the lights in the entire venue at once. The last person leaving the building can use it to make sure that no lights are unintentionally left on overnight or after an event, without having to walk through every room separately.
Sustainability added value: Eliminating accidentally forgotten lighting cuts unnecessary electricity consumption and the related CO₂ emissions.