1. Measure the cut-out
Record the existing cut-out diameter and ceiling depth. Product photos are not a substitute for the live dimensions.
LED Downlight Installation
LED downlight installation guide
Choose the right LED downlight before the ceiling is cut
The important installation decision is not only the size of the fitting. You also need to match voltage, transformer requirements, dimming, cut-out and the room environment before an electrician closes the ceiling.
Quick answer
A 230V downlight can simplify a replacement where the fitting and wiring are suitable. A 12V fitting needs a compatible transformer, while a dimmable fitting needs a compatible dimmer. Confirm the exact product instructions and have mains-voltage work completed by a qualified electrician.
Important LED Downlight Advisory
Please read the information below carefully, especially the guidance on 12V LED downlights and dimmable LED downlights. Choosing the wrong transformer or dimmer can cause your LED downlights to flicker, fail, or not work correctly.
AC 230V LED Downlights
This is the simplest option for most homes and installations. In many cases, your old downlights can be removed and replaced with new, energy-efficient LED downlights.
Because 230V LED downlights connect directly to mains power, there are fewer components involved, which generally means a simpler, more reliable installation.
DC 12V LED Downlights
Most 12V LED downlights are not compatible with older electronic halogen transformers. For this reason, we usually recommend changing to 230V LED downlights where possible.
LED-compatible transformers can be costly, and in South Africa each 12V downlight should have its own suitable transformer. This often makes a 12V LED conversion more expensive than expected.
By moving to 230V LED downlights, you reduce the number of components in the installation. This can improve efficiency, reduce future maintenance, and lower the risk of transformer-related failures.
Dimmable LED Downlights
Not all LED downlights are dimmable. If you require dimming, please make sure you choose downlights specifically marked as dimmable LED downlights.
Our dimmable LED downlights are designed to work with compatible push-button dimmer switches. In many cases, they may work with your existing push-button dimmer, but compatibility cannot always be guaranteed.
If your current dimmer does not work correctly, or if the lights flicker, buzz, or do not dim smoothly, you may need to replace it with our compatible LED Dimmer Module.
Need Help Choosing?
If you are unsure whether to choose 230V, 12V, or dimmable LED downlights, contact us before purchasing. We can help you choose the right option for your installation.
The decision that affects the install
Compare voltage, dimming and the existing ceiling
Use the product specification and the condition of the existing installation together. A familiar cut-out does not guarantee that the old transformer, dimmer or connector can be reused.
| Option | What it changes | Check before ordering |
|---|---|---|
| 230V LED downlight | Connects to mains power without a separate low-voltage transformer where the fitting is designed for that supply. | Cut-out, depth, terminal arrangement, insulation clearance and electrician suitability. |
| 12V LED downlight | Needs a suitable LED-compatible transformer for the light and installation. | Transformer output, one-transformer-per-fitting requirement where applicable, access and total cost. |
| Dimmable LED downlight | Can be dimmed only when the downlight and dimmer are compatible. | Exact dimmer type, load range, minimum load and flicker/buzz behaviour. |
| IP-rated downlight | Uses a stated ingress-protection rating for the listed environment. | Room zone, ceiling construction, ventilation and the complete installation method. |
Plan the work in the right order
Five checks before the electrician arrives
2. Identify the supply
Confirm whether the current fitting is 230V or low voltage and whether a transformer is present above the ceiling.
3. Decide on dimming
If the room needs dimming, choose the downlight and dimmer as one compatibility decision rather than adding a dimmer later.
4. Check the environment
Bathrooms, covered exteriors and damp areas need a product and installation method suited to the location. Use the stated IP rating and room zone guidance.
5. Keep access practical
Allow for driver or transformer access where the chosen system needs it. Do not bury a component that may need inspection or replacement.
6. Confirm the final product page
Read the exact listing for wattage, voltage, colour temperature, dimmability, dimensions and cut-out before purchase.
Verified starting points
Choose a fitting, then confirm the details
These live products show why the specification matters. They are not interchangeable recommendations.
Black GU10 recessed downlight
Use this as a starting point when the project calls for a recessed GU10 fitting. Confirm the lamp, cut-out, ceiling depth and any dimming requirement on the live listing before ordering.
View the GU10 downlight
1W black square LED downlight
This compact fitting is listed at 1W and 4200K. Check the exact dimensions, supply requirements and intended application before treating it as a direct replacement for an existing fitting.
View the square downlightNeed a second check?
Send the cut-out, supply and room details
If you are replacing several fittings or are unsure about a transformer or dimmer, share the existing fitting details before ordering. We can help you narrow the product type, but mains-voltage installation should still be handled by a qualified electrician.