The design of the housing of the visually appealing A-series escape sign luminaires for wall/ceiling mounting has been improved to make on-site installation much easier. It is now also possible to realise an optional lateral cable entry, which makes adaptation to the respective installation situation much more flexible. The housing now also offers the option of correctly aligning the luminaire on the wall. Furthermore, the luminaire attachment is de-energised after opening the housing by using plug-in contacts.