Why You Must Replace the Whole Unit — Not Just the Light

From Bulbs to Integrated LEDs

In the past, replacing a light was easy — if a globe blew, you just changed it. But modern LED fittings are built very differently. The light and its driver (the power control unit) are designed and tested to work together as a matched system.

One System, One Lifespan

When the light section fails, you must replace the entire unit, not just the LED part. The driver and light module share the same lifespan and electrical tolerances. Mixing an old driver with a new light can cause flickering, reduced brightness, or early failure — and often voids the warranty.

Plug-In vs Hardwired Installations

It’s also worth understanding how they’re installed. Many modern downlights and fittings use a plug-in power point in the ceiling, allowing quick and safe replacement without the need for an electrician to hard-wire anything. Older or budget models, however, are hardwired directly into the mains, which means they must be replaced by a licensed electrician. If your fitting uses a plug-in connection, swapping the whole unit is straightforward and safe.

Connectors Are Never the Same

Even if you wanted to replace just the light, it’s rarely possible. The plugs and connectors between the light and the driver are almost always different between models, brands, or even production runs. They’re not standardised, and manufacturers regularly update designs to improve efficiency and safety. Finding an exact replacement for an older fitting is nearly impossible once the model changes.

Long LED Lifespans

The good news is that LED lights are built to last — typically 25,000 to 50,000 hours, or many years of everyday use. When one finally reaches the end of its life, replacing the full fitting ensures you get a fresh, efficient, compliant, and warrantied unit.

The Bottom Line

LED lighting isn’t like changing a globe. The light, driver, and connectors form one complete system — and when one fails, the whole unit must be replaced to keep your lighting safe, reliable, and up to standard.