Book 20:
Smart interface between indoor luminaires and sensing / communication modules

Book 20 defines a smart interface between an indoor LED luminaire and a sensing/communication node. The node connects to the LED driver and control system, and typically can provide sensory inputs or enable communication between network components. Nodes can be installed and replaced in the field.


Key benefits are provided for
- luminaire makers, as certified sensors from multiple suppliers are available with a range of different functions
- installers, as certification on interoperability of components exists
- end-users, as the luminaire can be adapted with nodes for different functions, like air quality, presence detection, light levels etc.


==> If you want to find out how the L-Prize awards points for use of Zhaga Book 20 and D4i, please check further below on this page


Book 20 interface specification - download


About certification:

You want to certify your products? See the process

When submitting your product for testing, you might also need to hand over Letters of Confirmation (LoC). See details in the specifications.

Templates for Letters of Confirmation (LoC) for Book 20 
Book 20-LoC-LEX-LP
Book 20-LoC-LEX-M
Book 20-LoC-LEX-MR
Book 20-LoC-Luminaire


Read more about the Zhaga-D4i certification


Book 20 illustration with luminaire new colour


L-Prize awards points for use of Zhaga Book 20 and D4i

The L-Prize, a lighting competition announced by the US Department of Energy (DOE) with a prize fund of up to $12.2 million, rewards data-rich, upgradeable luminaires.
Luminaires designed in compliance with D4i or Zhaga Book 20 will be rewarded with extra points during evaluation for the L-Prize. See Press Release.


Webinar by Zhaga and the DALI Alliance, August 19, 2021 - watch recording

Details of how Zhaga Book 20 and D4i can contribute to a successful L-Prize submission were explained in a webinar presented by the Zhaga Consortium and the DALI Alliance.


- Gabe Arnold, Senior Engineer, Pacific Northwest National Laboratory - PNNL - download presentation

- Scott Wade, Technical & Certification Manager, DALI Alliance - download presentation

- Adrian Green, Chair Zhaga Working Group Book 20, Amphenol - download presentation

Moderator: Paul Drosihn, General Manager, DALI Alliance


Information for companies interested in participating in the L-Prize

- Zhaga Book 20 - Video - watch here
- Zhaga Book 20 - Specification - download
- Zhaga Book 20 - Presentation - download
- Zhaga Book 20 - Certification process - check here
- Zhaga-D4i - Certification - check here
- Information about the DALI Alliance and D4i -