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Zhaga approves Book 9

Posted on Tuesday April 28 2015, by Tim Whitaker

The Zhaga Consortium has approved Book 9 as its latest interface specification for LED light sources.

Zhaga Book 9 defines the interfaces of LED light engines (LLEs) that comprise LED modules with a ring-shaped light-emitting surface (LES) and a separate LED driver (electronic control gear).

Zhaga is creating a set of interface specifications, known as Books, which define LLEs and/or associated components by means of the mechanical, photometric, electrical, thermal, and control interfaces between the product and its environment. 

The LED modules defined in Book 9 could be used in LED luminaires for consumer lighting applications, such as small spotlights, track lighting and other compact luminaires.

There are two light-source categories in Book 9, which are defined by the dimensions of the LES:
• RL25 – LES ring with inner and outer diameter of approx. 20 and 30 mm, respectively
• RL12 – LES ring with inner and outer diameter of approx. 7 and 17 mm, respectively

The LES ring is an area that is available for mounting light-emitting components with a maximum height of 2.0 mm. Zhaga also defines an optics contact area (OCA) for each LED module, which is a surface with a defined shape and location that allows for stable and functional positioning of the luminaire optics. 

Zhaga also defines an LED module demarcation boundary, which corresponds to the maximum dimensions of the module. For the two categories, these values are:
• RL25 – 35.0 x 32.5 mm
• RL12 – 20.0 x 17.32 mm

Book 9 LED modules can be mounted in a luminaire by means of screws, and are intended to be replaced by professionals only. As with other Books, Book 9 must be read together with Zhaga Book 1, with contains general information and definitions.

Zhaga is a global lighting-industry consortium that aims to standardize LED light engines and associated components, and to simplify LED luminaire design and manufacturing.