One feature of DALI is that the entire setup is standardized systematically.
Figure below is a listing of the DALI standard numbers. Data transfer route basics are covered by 101, control gear by 102, control devices by 103, and so on. Control devices include routers, switches, and motion sensors. Control gear includes lighting fixtures. Upper-level extended standard numbers (2xx) cover characteristics specific to various devices. This means that a variety of lighting products can be developed on a shared foundation.
DALI is an open standard, so all products that conform to it can interconnect with each other and the overall system can be controlled in order to reduce energy use. In the past products from one manufacturer could only interoperate with other products from the same manufacturer. With DALI, products from different manufacturers can be controlled in the same manner, to adjust the brightness and color for example.
By adopting the international DALI standard it is possible to maximize the energy efficiency of the building's lighting system.
Renesas was the first semiconductor device manufacturer to join the DALI standardization organization.
Source: DALI - a working party of ZVEI
DALI Standard Listing
"Task/ambient lighting" means that different types of lighting are used for "tasks" such as desks and for "ambient" areas such as floors and corridors. Task lighting should provide the brightness desired by those in the task area in order to improve work efficiency, while ambient lighting can be energy efficient because it is not necessary to brightly light all parts of the room. In addition, motion sensors can be used to detect when people are around, and the lights can be turned off on floors where no one is present, further saving energy. Figure below shows an example of task/ambient lighting using DALI.
This task/ambient lighting configuration allows individual control of the lighting of task areas such as desks and of ambient areas such as floors and corridors. The lighting fixtures, sensors, and switches are all connected via DALI, and alternatively a unit such as a lighting controller can be used to provide centralized management. In this way DALI can be used to link and control all essential devices, making it easy to implement task/ambient lighting.
Example of Task/Ambient Lighting Using DALI