Overview of Zhaga Books

Zhaga is creating a set of Interface Specifications, known as Books, which define the conditions necessary for interchangeability. Each Book defines an LED light engine and/or associated components by means of the mechanical, photometric, electrical, thermal, and control interfaces of the product to its environment. 

The main features of each Zhaga Book are summarized in the following presentation:
Introduction to Zhaga Books (PDF file)

Products based on several of the Zhaga Books are already in common use in the global lighting market. Zhaga continues to develop new specifications that reflect the needs of luminaire makers and other stakeholders.

As well as browsing the Book library, you can select Books according to the shape of light-emitting surface (LES), whether the driver is integrated or separate, or whether the light source is socketable or not.

View the Book Selector

Books by family

Book 1 - General

Book 1 defines features that are common in multiple Zhaga interface specifications, such as common definitions; the mechanical interface of separated LED drivers (electronic control gear); and the generic aspects of thermal interfaces.

More information on Book 1

Spot modules (Books 3, 10, 11) and LLEs (Book 17)

Books 3, 10 and 11 comprise a family of circular LED modules with a range of sizes. These are suitable for spotlighting and related applications.

The LED modules in Books 3, 10 and 11 operate with a separate LED driver. For each Book and module size there is a range of categories based on the diameter of the light-emittng surface (LES).

Spot family of modules - comparison of sizes and LES categories

Book 11 - 35 mm diameter modules

Book 3 - 50 mm diameter modules

Book 10 - 75 mm diameter modules

Book 17 defines LED light engines (LLEs) with an integrated driver and a circular light-emitting surface (LES). These are suitable for spot-lighting applications such as compact indoor luminaires.

More information on Book 17

Linear and square modules - Books 7 and 9

Book 7 specifies a family of linear and square LED modules, with a wide range of dimensions.

The modules operate with a separate LED driver and are intended primarily for indoor lighting applications.

More information on Book 7

Book 9 specifies a set of LED modules with a ring-shaped light-emitting surface (LES). 

The small, mid-power LED modules operate with a separate LED driver, and have diameters of 12 mm or 25 mm for the ring-shaped LES.

More information on Book 9

 

Book 12 - COB arrays

Book 12 defines a family of rectangular and square LED modules with a circular light-emitting surface (LES). These modules require a separate LED driver, and can be used either with or without holders, depending on the luminaire type and application.

Most Book 12 modules will use chip-on-board (COB) technology for the light-emitting section.

More information on Book 12

Book 13 - LED drivers

Book 13 defines the interface specifications of LED drivers (also known as electronic control gear, or ECG) that can be used in combination with different LED modules.

More information on Book 13

Planar, circular LLEs - Book 16

Book 16 defines planar, circular LED light engines (LLEs) with an integrated driver. Such LLEs could be used in flat, circular luminaires with a homogeneous, low-glare surface.

More information on Book 16

Connectivity socket - Book 18

Book 18 will define a standardized interface between a sensor and communication module, located on the exterior of an outdoor LED luminaire, and the LED driver inside the luminaire.

More information on Book 18

Outdoor - Book 4 and Book 15

Book 4 defines the interfaces of high-intensity LED light engines (LLEs) comprising a rectangular, non-socketable LED module with a separate LED driver (electronic control gear).

For applications that need a high-intensity light source, such as outdoor and industrial lighting.

More information on Book 4

Book 15 defines LED modules that are designed to be used in conjunction with lens arrays, for outdoor lighting applications.

More information on Book 15

Socketable linear - Book 14

Book 14 defines a linear LED light engine (LLE) with a cap/holder system that enables tool-less replacement.

More information on Book 14

Socketable circular - Books 2, 5, 6 and 8

Several Zhaga specifications describe circular, socketable LED light engines and modules. These light sources are designed to fit into a socket or holder, which in turn is typically fixed into a luminaire.

A Book 2 LLE has a round drum shape with maximum dimensions of 70.2 mm diameter and 45 mm height. It has a circular light-emitting surface with a typical diameter of 59 mm, and a PHJ65d type base.

A Book 8 LLE has maximum dimensions of 95 mm diameter and 45 mm height. The circular LES with a diameter in the range of 59 mm to 71 mm, and a PHJ85d base.

More information on Book 2

More information on Book 8

Book 6 defines a socketable, circular LLE with nominal dimensions of 90 mm diameter and 42 mm height. The LLE has a GH76p base.

More information on Book 6

Book 5 defines a socketable, circular LED module with a separate LED driver. The circular LED modules in Book 5 have maximum dimensions of 70 mm diameter and 21 mm height.

More information on Book 5

Books by number

Book number

Description

Integrated

driver

Separate

driver

Current status

Book 1

General information n/a n/a

Approved. Available in English, Chinese.

Book 2

Socketable circular x  

Approved. Available in English, Chinese.

Book 3

Spot modules (50-mm diameter)   x

Approved. Available in English, Chinese.

Book 4

High-intensity modules for outdoor   x

Approved. Available in English.

Book 5

Socketable circular module   x

Approved. Available in English.

Book 6

Socketable circular LLE x  

Approved. Available in English, Japanese

Book 7

Linear and square modules   x

Approved. Available in English, Chinese.

Book 8

Socketable circular LLEs x  

Approved. Available in English, Chinese.

Book 9

    x

Approved. Available in English.

Book 10

Spot modules (75-mm diameter)   x

In development

Book 11

Spot modules (35-mm diameter)   x

Approved. Available in English.

Book 12

COB arrays   x

Approved. Available in English.

Book 13

Drivers n/a n/a

Approved. Available in English.

Book 14 Socketable linear LLEs x   In development
Book 15 Modules to fit with lens arrays   x In development
Book 16 Planar circular LLEs x   In development
Book 17 Spotlight LLEs x   In development
Book 18 Connectivity socket n/a n/a In development