What Is an LED Driver?
The LED driver is the part that actually runs the LEDs. Here is what it does, why you need one, and how to pick the right type.
LED Driver Knowledge Center
Everything we know about specifying LED drivers, written by the XGW R&D team for luminaire OEMs, specifiers and contractors. Each guide answers a question we get asked in real projects — no filler, and no numbers we cannot stand behind.
What is an LED Driver?
Start here if you are new to drivers.
Constant Current vs Constant Voltage
The first fork in every spec.
CC vs CV
CC drivers hold current steady; CV drivers hold voltage steady. Pick the wrong one and the fitting misbehaves or fails.
How to Read a Driver Label
Decode the output, input and Tc point.
Driver Sizing Worked Examples
Two sizing calculations with headroom.
IP20 vs IP67
Where the driver may live.
Choosing an IP67 Driver
IP67 means dust-tight and briefly immersible, but the rating alone does not tell you whether the driver survives outdoors.
IP20 vs IP67
What the rating actually changes.
DALI 2.0
The open digital control bus.
DALI 2.0 vs DALI 1
DALI-2 added device-level certification and a defined set of device types. Here is what that means for a specifier.
What Is DALI?
The protocol in plain English.
D4i
Intra-luminaire smart control.
What Is D4i?
Power and memory inside the luminaire.
D4i vs DALI-2
What D4i adds on top of DALI-2.
Zhaga Book 18
The socketable LED interface.
Zhaga Book 18 Explained
Zhaga Book 18 is the standard that lets an LED module and a sensor/controller node click together in the field.
Zhaga vs NEMA
Book 18 vs ANSI C136.41.
Emergency LED Driver
Keep the lights on when mains fail.
What Is an Emergency Driver?
An emergency driver keeps a luminaire lit from a backup battery when mains power fails. This is how it works.
Emergency Selection Guide
Match battery chemistry, duration and fit to the luminaire. A short checklist for specifiers.
LiFePO4 vs NiCd
LiFePO4 is lighter and longer-lived; NiCd is cheaper and proven. Which belongs in your emergency driver?
EN 1838 / UL 924
Emergency lighting compliance.
Selection Guide
Pull it together.
LED Driver Selection Guide
The master step-by-step checklist.
Troubleshooting
When something goes wrong.
Troubleshooting
Flicker, buzz and early failure.
Start with the product range
- All LED Drivers — IP20/IP67, constant current and constant voltage, 12-1800W
- DALI 2.0 LED Drivers
- Emergency LED Drivers
- Zhaga Book 18 Socket — and NEMA socket (ANSI C136.41)
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