LED technology

Connected control within the luminaire

D4i extends the DALI-2 certification programme with defined data and power-supply requirements. It supports communication between LED drivers and luminaire-mounted devices such as sensors and control nodes. A suitable wireless control device can connect this local information to an external network. D4i certification should be checked for the exact component being specified; a general description of a lighting system is not evidence of certification. Source: DALI Alliance, D4i overview.

Data for operation and maintenance

DALI Data separates information into three areas: luminaire information under Part 251, energy reporting under Part 252, and diagnostics and maintenance under Part 253. These parts are required for D4i-certified LED drivers, while they are optional within DALI-2 certification. Standardised data storage can support asset records, energy monitoring and fault investigation. Some individual reporting fields are optional, so the information available from a particular driver still needs verification. Source: DALI Alliance, DALI Data.

Interfaces and component compatibility

Zhaga-D4i combines D4i requirements with defined connector interfaces. The joint certification programme covers compatible luminaires and mounted control devices, including sensors and communication nodes. Zhaga Book 18 addresses outdoor applications; Book 20 addresses indoor applications. Checking the relevant certification and interface is an important step when selecting components for a connected-lighting design. Source: DALI Alliance, Zhaga-D4i certification.

Industry reference: Big River Crossing

In its published case study of Big River Crossing in Memphis, Tennessee, United States, Signify reports that the installation uses 2,370 fixtures and a connected architectural-lighting system managed through Interact Landmark. Its case study describes remote scene changes, scheduled light shows and automatic dimming to accommodate rail and maritime lighting requirements. Source: Signify, Big River Crossing.

Editorial takeaway: Architectural-lighting planning can consider day-to-day operation alongside visual effects: who controls the scenes, when lighting changes, and how site-specific operating requirements are addressed.

This is a third-party reference, not a TaoGroup project. The cited case does not establish that this installation uses D4i or Zhaga-D4i.