Choosing LED Drivers with EL (Electronic Controlgear for Emergency Lighting) Mark

150w el

LED driver for emergency lighting is a crucial component that ensures the proper operation of LED fixtures during power outages or emergencies. LED drivers are responsible for regulating the electrical current and voltage supplied to the LED light source when powered by DC voltage from batteries.

General Description

EL mark related regulation is defined by IEC61347-2-13 Annex J.

p1 700

EL mark symbol is as below.

p2 206

EOFx Requirements

The key requirement of EL mark is that LED driver is able to output rated current to make sure of the light output when emergent affairs happen or it goes into emergency mode with DC voltage input from batteries.

And this function is described by EOFx (Emergency Output Factor) which is measured is measured 5s and 60 s after energizing the control gear by DC input. The test value at 5s with maximum emergency supply voltage shall be at least 50 % of the declared EOFx at 60s.

eofx requirements 800

Also programmable EOFx is a function employed by more and more EL marked drivers, and it helps customers to find a good balance between light output and duration in emergency mode according to different application and market requirements.

DC Input Capability

Some emergency lighting systems may be powered by DC sources, such as batteries or renewable energy systems. LED drivers with DC input capability can efficiently work with these power sources without the need for additional conversion devices.

dc input capability 800

Example of a EL Mark Report

Here is an example of uPowerTek EL mark report.

p3 505 1


EL mark is necessary for emergency lighting systems and LED drivers with EL mark should be carefully selected according to different applications. Programmable EOFx is a great feature for users to have flexible design.

Related posts

Table of Contents

dali ultimate guide 1

To help you better understand DALI dimming technology, we created a 30 pages PDF book. You can get it free today just by putting your E-mail here. 

Scroll to Top