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Book 14:

Socketable linear LED light engines

March 2017: Book 14 Edition 1.1 is now published. Edition 1.1 includes both LED modules and LED light engines.

Book 14 defines a family of flat, linear, socketable LED light sources that are suitable for low-profile linear lighting. Edition 1.1 includes both LED modules (requiring a separate driver) and LED light engines (LLEs) that have integrated control gear.

The LLEs or LED modules have a cap/holder system that enables tool-less replacement. One end of the LED light source has a contact cap, which fits into the corresponding contact holder in the luminaire, while the other end has a support cap and support holder.

The intended application is in free air (i.e. the holders are not surrounded by a luminaire body), or in a luminaire that does not introduce a significant temperature increase.


For a short overview of Book 14, watch the video below or download the presentation (PDF file).

Specification details

There are three categories of both LLEs and LED modules in Book 14, as shown in the Table. The description below refers to both LLEs and LED modules. Zhaga defines the maximum outline of the LLE, the position of the support cap and contact cap in the LLE, and the position of the support holder and contact holder in the luminaire.

Category Max. LLE length
L60W5 565 mm (2 ft)
L120W5 1166 mm (4 ft)
L150W5 1466 mm (5 ft)

The LLEs have a maximum height of 35 mm and a maximum width of 50 mm, although much flatter and narrower LLEs are possible.

Like most Zhaga specifications, Book 14 does not restrict features such as the position, type and performance of the LEDs used inside the LLE. However, manufacturers will need to measure and report a specified set of data for each LLE product.

Certified products

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.