With our battery-powered systems, emergency signs as well as safety lights will ensure a safe exit from the building, and to avoid accidents after a power outage. They are a key factor in orientation of the building to make sure that even nonlocal people will find their way out of the building. The installation, maintenance, and condition of a safety lighting system are governed by a large number of rules and regulations that are interlinked by references. This concerns both lighting and electrotechnical issues.