Zhaga Interface Specification Book 5 defines the interfaces of LED light engines (LLEs) comprising a socketable, circular LED module with a separate LED driver (electronic control gear).
The circular LED modules in Book 5 have maximum dimensions of 70 mm diameter and 21 mm height. Book 5 allows optical accessories with defined widths of up to 180 mm and heights up to 180 mm.
Book 5 LED modules have typical light-emitting surface (LES) diameters ranging from 13.5 mm to 26 mm.
Book 5 LLEs are primarily intended for use in down-lighting or spot-lighting luminaires.
Public downloads are available:
Download Book 5 (English) - Edition 1.2, April 2014
The Zhaga Consortium will review and update this specification from time to time. To ensure you are aware of any updates to the Zhaga specifications, please subscribe to the Zhaga newsletter.
Zhaga members can certify products according to this Book, using various Authorized Test Labs.
Products that are certified according to each Book are listed in the Certified Products database.
Please download the following PDF file for an overview of Book 5:
This Book must be read together with Zhaga Interface Specification Book 1.
Book 5 LED modules are designed to be locked into a luminaire by means of a twisting motion. Mechanical fit keying is present to ensure that the module will only fit into a luminaire that can provide the correct electrical connection.
The light output is essentially lambertian, which enables the luminaire optics to shape the light distribution to the needs of the application.