Product finder for choosing LED dimmers
Dimming LED lighting can sometimes be more difficult than expected. Think of flickering lamps, buzzing dimmers, humming lights, or limited dimming range. The cause is often an incorrectly selected dimmer or a non-dimmable lamp.
In this blog, we explain what to look out for when dimming LED lamps, so you can get started well prepared. Please note: Magnetic 48V track lighting cannot be dimmed with a standard LED dimmer.
1. Is your lighting dimmable?
Not all LED lamps are dimmable. You can recognize this by a symbol or text on the packaging.
- Dimmable LED lamps: Work with the right LED dimmer.
- Non-dimmable LED lamps: Flicker or may be damaged if you try to dim them.
If in doubt, it is always advisable to choose a lamp explicitly labeled as dimmable.
2. Does your lamp operate at 12V or 230V?
LED lamps operate at different voltages.
230V LED lamps (directly connected to the mains)
These are easy to dim with a suitable LED dimmer. Common types include:
- E27 (large socket)
- E14 (small socket)
- GU10 (most commonly chosen track lighting spotlight)
12V LED lamps (with a transformer)
For example, G4, MR16, or MR11. With these lamps, the transformer plays a major role.
- Halogen transformers (30–500W load) often do not work with LED because LED lamps consume too little power.
- Dimmable 12V LED lamps require a special LED transformer.
A standard halogen dimmer is not suitable for LED lighting.
3. Which LED dimmer do you need?
Many dimming problems arise because the wrong type of dimmer is used.
Why doesn't a standard halogen dimmer work well with LED?
Halogen dimmers often have a minimum load of 40–60W, while LED lamps often consume less than 10W. This causes lamps to flicker or fail to dim.
An LED dimmer is necessary
- LED dimmers are optimized for low wattages, such as 0–150W or 0–450W.
- They are compatible with modern dimmable LED lamps.
4. Leading-edge vs. trailing-edge dimming – which type of dimmer do you need?
LED dimmers use two dimming technologies.
| Dimming technology | Abbreviation | Suitable for |
|---|---|---|
| Leading-edge dimming | RL | Halogen, some LED lamps |
| Trailing-edge dimming | RC | 90 percent of all LED lamps |
| Universal (both technologies) | RLC | Both LED and halogen |
When the dimming technology is not indicated on the lamp, trailing-edge dimming is the best choice because it works with most LED lamps.
5. Special attention to track lighting and 48V magnetic tracks
Dimmable track lighting (230V – GU10 spotlights)
- Use a dimmable LED GU10 lamp in combination with a suitable LED dimmer.
- Make sure that the total load falls within the dimmer’s rated load.
48V magnetic track lighting – please note
Magnetic track lighting operates at low voltage (48V) and requires a special driver. This means:
- Cannot be dimmed with a standard LED dimmer.
- A driver with an integrated dimming function is necessary, such as DALI, Zigbee, or 0–10V.
If in doubt, we recommend always consulting the driver’s specifications.
6. Connected load and the importance of a stable load
When LED lamps continue to flicker despite using a suitable dimmer, this may be caused by an insufficient connected load or a combination of different types of lamps.
- Check the dimmer’s minimum load. A dimmer rated at 5–100W may not work properly if only one 3W lamp is connected.
- Use only lamps of the same type on a single dimmer. Do not mix LED and halogen lamps or combine different wattages.
7. What should you do if the lamps flicker or buzz?
Common problems and solutions.
| Problem | Cause | Solution |
|---|---|---|
| Lamps flicker | Incorrect dimmer, insufficient load | Choose a dimmer with a lower minimum load or add extra lamps |
| Lamps buzz | Incorrect dimming technique | Choose a trailing-edge dimmer |
| Lamps do not dim deeply enough | Dimmer not calibrated | Use a dimmer with min-max adjustment |
| Magnetic track lighting does not dim | No suitable driver | Use a driver with an integrated dimming function |
A dimming stabilizer can help with flickering lamps.
8. Cover plates: does your dimmer fit into the existing switches?
Not all dimmers fit directly into existing switchgear. It is therefore important to check whether your dimmer is compatible with well-known brands such as Jung, Busch-Jaeger, Gira, Berker, and Peha.
Some dimmers, such as EcoDim, are suitable for most brands.
Checklist: how to choose the right LED dimmer
- Check whether the LED lamp is dimmable.
- Check whether the lamp operates at 12V or 230V. A transformer is required for 12V.
- Choose an LED-specific dimmer, not a halogen dimmer.
- Use trailing-edge dimming (RC) for most LED lamps.
- For 48V magnetic tracks, a driver with an integrated dimming function is needed.
- Check the dimmer’s minimum connected load.
- Combine only lamps of the same type and wattage for stable dimming.
Conclusion: which LED dimmer is suitable for your lighting?
The right dimmer prevents problems such as flickering, buzzing, and limited dimming range.
- For 230V LED lamps, an LED-specific trailing-edge dimmer (RC) is the best choice.
- For 12V LED lamps, a dimmable LED transformer is necessary.
- For 48V magnetic tracks, a driver with an integrated dimming function is required.
Do you have any questions? Contact us and we will be happy to help.
