Ever installed a dimmer switch and ended up with flickering lights or a buzzing noise? You're not alone. The most common cause is a mismatch between your dimmer and your LED fitting. The good news? Once you understand the basics, it's easy to get right. Here's what you need to know.
Why Don't All Dimmers Work With LEDs?
Old halogen bulbs worked with almost any dimmer. LEDs are different — they need the right type of control signal to dim smoothly. Use the wrong dimmer and you might get:
- Flickering or strobing lights
- A buzzing or humming noise
- Lights that won't dim below 30%
- Shorter LED lifespan
The fix is simple: match your dimmer type to your LED fitting.
The Most Common Dimming Types
| Dimming Type | Best For | Typical Setting |
|---|---|---|
| Trailing Edge ⭐ Most common | LED downlights in homes | Residential |
| Leading Edge | Older halogen setups | Older homes |
| 0-10V | Offices, warehouses | Commercial |
| DALI | Smart buildings, precision control | Commercial/High-end |
Trailing Edge — The One You'll Use Most ⭐
Trailing edge dimming is the most common dimming type for LED downlights in Australian homes — and for good reason. It's smooth, quiet, and compatible with most modern LED fittings.
💡 Quick tip: If you're updating your home lighting, always replace old halogen dimmers with a trailing edge LED dimmer. It's the safest and most reliable choice.
Leading Edge — The Older Style
Leading edge dimmers were designed for halogen and incandescent bulbs. They're still around in many older homes but often cause problems with LEDs — flickering, buzzing, and poor dimming performance.
💡 Quick tip: If you have old dimmers installed, check your LED fitting's compatibility before assuming they'll work. When in doubt, swap to trailing edge.
0-10V — For Commercial Spaces
0-10V dimming uses a separate control wire to tell the light how bright to be. It's reliable and consistent, making it popular in offices, retail spaces, and warehouses. Not typically used in homes.
DALI — Smart Control for Commercial Projects
DALI (Digital Addressable Lighting Interface) is the most advanced option. It lets you control each light individually, set scenes, and integrate with building automation systems. It's the go-to for hotels, offices, and high-end commercial fit-outs.
🔍 Browse our DALI-compatible downlights →
Quick Summary
| Dimming Type | Should I Use It? |
|---|---|
| Trailing Edge | ✅ Yes — best choice for most homes |
| Leading Edge | ⚠️ Only if your fittings are compatible |
| 0-10V | ✅ Great for commercial projects |
| DALI | ✅ Best for smart/commercial buildings |
Still Not Sure Which Dimmer You Need?
Our team is happy to help you choose the right dimming system for your project — whether it's a single room or a full commercial fit-out.