Driver
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A driver is the power supply of an LED fixture — the device that turns mains electricity into the current the LED chips need. It sits hidden inside the fitting or in a service enclosure, yet it decides how long the fixture lasts: most early LED failures are driver failures, not dead chips.
What stands out
- Replacing the right driver often saves the whole fixture instead of scrapping it.
- Many part numbers have adjustable output current, covering several fixture configurations.
- A smaller spares store because fewer codes need stocking.
- Controllable versions allow dimming by schedule or by daylight.
Choosing the right one
Three things must match: output voltage within the load's range, output current matching the fixture, and total load wattage below the driver's rating — leave at least 20% headroom for stability. Control type must be decided early because the standards are not interchangeable and must match the building's control system. Published lifetimes always assume a stated temperature, so mounting one in a sealed box with no heat path invalidates the figure.
