Inside this dialog the luminaire type can be activated for emergency lighting or for artificial lighting as well. Choose one of the two options. 

Activate emergency lighting for a placed luminaire of this type.

After a luminaire of this type has been placed into a scene, emergency lighting has to  be activated in the properties tab for this luminaire.

For this purpose the checkbox " Emergency lighting on"  has to be ticked.

Finally, an emergency area has to be placed into the scene by going to the ribbon menu  „Insert“   and pressing the subsequent button  „Measuring object“ .