Book 21 defines a cost-effective mechanical and electrical interface for toolless replaceable linear LED modules, enabling plug and play interoperability and supporting circular economy.
These LED modules are max 20mm wide and have lengths of 1, 2, 4 or 5 feet. They are suitable for both indoor and outdoor lighting applications. The products are intended to be installed and exchanged by and professionals.

Book 21 defines an industry standard that allows a vendor independent replaceability of linear LED modules available in different performances and features as defined by the module supplier. For the luminaire manufacturer, this guarantees a maximum flexibility in product choice for differentiation and innovation and it eases production process by late-stage configuration.

In the field, Book 21 enables serviceability of luminaires through easy exchange of LED modules. Book 26 defines a cost-effective mechanical and electrical interface for toolless replaceable linear LED modules, enabling plug and play interoperability and supporting #circular economy. These LED modules are max 20mm wide and have lengths of 1, 2, 4 or 5 feet. They are suitable for both indoor and outdoor lighting applications. The products are intended to be installed and exchanged by professionals.

Book 26 defines an industry standard that allows a vendor independent replaceability of linear LED modules available in different performances and features as defined by the module supplier. For the luminaire manufacturer, this guarantees a maximum flexibility in product choice for differentiation and innovation and it eases production process by late-stage configuration. In the field, Book 26 enables serviceability of luminaires through easy exchange of LED modules.

There are many uses supported by the introduction of a standard for smart and serviceable indoor luminaires which include, the ability to save energy through occupancy sensing and timings, ambient light level detection, wireless commissioning, lux level management, asset management via people tracking, secure local wireless data networks and lighting control and programming control gears.

Book 20 enables these uses and defines a smart interface between an indoor LED luminaire and a sensing/communication module.

Manufacturers of LED luminaires currently use a variety of programming methods to set the operating characteristics of LED drivers inside luminaires. Zhaga has standardized a digital, wireless programming approach using near-field communication (NFC). The NFC programming specification lists the qualified NFC readers that luminaire manufacturers shall use for programming LED drivers with an integrated NFC tag.

An increasing number of lighting applications requires reading out parameters and changing of settings of LED drivers in the field.Zhaga aims to give installers, system integrators and utility companies the option to select only one programming tool which works with all field-maintenance applications from all vendors implementing Book 25.Zhaga Book 25 builds on Book 24, Programming of luminaire components using NFC, but now includes mobile NFC Readers with a Bluetooth interface. It enables maintenance and replaceability with a cross vendor harmonized method of NFC programming for in-field use.

The specification defines a Bluetooth communication protocol (GATT-Service) which NFC Reader manufacturers can implement for the communication between the field-maintenance application on a smart device (cell phone, tablet, etc.) and the NFC reader.

This allows the field-maintenance app to read and write parameters on NFC enabled LED drivers without the need for a cable-based connection. Field maintenance with Book 25 may also be used for other components requiring programming, such as sensors or connectivity nodes.

Zhaga published in April 2021 the Book 18 Ed. 3.0 which specifies a smart luminaire interface between an outdoor luminaire, its built-in control gears and a socket-based sensor or communication modules. Edition 3.0 also allows for architectures combining an ANSI C136.41 dimming receptacle with a Zhaga receptacle.  This architecture simplifies the addition of communication/sensor modules to LED luminaires with plug-and play interoperability.

Communication/sensor modules can be easily mounted on the luminaire and can be easily replaced with new nodes.