DALI (Digital Addressable Lighting Interface) is a control system for lighting control devices in building automation. Almost all GRAU luminaires can be equipped with DALI (optional), but upgrading to the GRAU app control is even more flexible and smart. You can find more information here. Using DALI requires five-wire wiring on the building side. Manual dimming of the luminaires requires a DALI dimmer or integration into a DALI bus system.