DALI („Digital Addressable Lighting Interface“) is a protocol that can be used to control lighting devices such as LED drivers, ballasts and dimmers in building automation. The connection is made via the DALI bus system. Up to 64 actuators and a maximum of 16 groups can be controlled in each BUS system.
A DALI system can be expanded using expanders (several DALI devices receive only one DALI address) or repeaters (cable length). The importance of DALI is becoming more and more important, since due to the strong upswing in LED technology, conventional dimming as is usual with halogen or incandescent lamps is hardly possible anymore.