Digital Addressable Lighting Interface (DALI) is a standardized, addressable digital lighting interface. At the physical level, DALI is a two-wire bus that can be routed along with power lines. DALI uses digital signal transmission, which makes it less vulnerable to transmission errors that are common with analog control signals. The DALI standard allows individual addressing and configuration of individual luminaires on a common bus. In addition, DALI devices can be programmed for group use.