In response to the addition of the Digital Addressable Lighting Interface (DALI) ballast protocol to the international fluorescent ballast standard, representatives from the National Electrical  Manufacturers Association (NEMA) Lighting Controls, Ballast, Luminaire and Wiring Device Sections began development of an additional DALI protocol to incorporate lighting control devices such as  wall switches, scene  switches, occupancy sensors and photo sensors.

The proposed control interface is designed to be minimal in scope, yet robust enough to allow for full interoperability of DALI devices manufactured by various companies.  This universal standardization of DALI control devices, along with the existing DALI ballast standard, will facilitate the design and implementation of complete, dynamic DALI lighting systems composed of products from multiple manufacturers.