Are All Dimmable Lights the Same?

You’ve chosen a dimmable light fitting — job done, right? Not quite. Just because a light is labelled "dimmable" doesn’t mean it will work perfectly with every dimmer switch.

In this guide, we’ll explain how dimming actually works, the different types of dimmable lights, and how to avoid common problems like flickering, buzzing, or lights that won’t turn off properly.

What Does "Dimmable" Actually Mean?

A dimmable light fitting or bulb means its brightness can be adjusted — usually via a wall-mounted dimmer switch. However, whether it works smoothly depends on both the light source and the type of dimmer used.

Not All Dimmable Lights Work with All Dimmers

This is where most problems start. There are different types of dimming technology, and mixing the wrong kind can cause issues.

Common Dimming Types:

• Leading Edge (Triac) Dimmers: Originally designed for incandescent or halogen bulbs. Some modern LEDs are now designed to be compatible with leading edge, but not all.
• Trailing Edge Dimmers: Designed specifically with LEDs in mind. Provide smoother, quieter dimming and work with most LED-compatible fittings.
• 0–10V or DALI Dimming: Used in commercial or specialist installations. These require specific wiring and controllers.

If you pair an LED light with the wrong dimmer (e.g. a traditional dimmer not designed for LED), you might get:

• Flickering
• Buzzing noises
• Reduced dimming range
• Lights not turning off completely

Programmable LED Dimmer Modules

Most modern dimmer modules are now programmable or adaptive, meaning they can be configured to suit the load and type of light. These dimmers:

• Switch between leading edge and trailing edge modes
• Allow minimum and maximum brightness adjustments
• Help reduce flickering and expand dimming range

Brands like Varilight, Zano, and Hamilton offer programmable dimmers specifically built for LED lighting. They're ideal when you want smooth, reliable dimming — even with mixed or low wattage loads.

What About Step Dimming?

Step dimming is a clever feature available on some fittings that allows dimming without using a dimmer switch. You simply toggle the power (on/off/on) to cycle between preset brightness levels like 25%, 50%, and 100%.

Step-dim fittings are great for:

• Table lamps and ceiling lights where wall dimmers aren’t used
• Retrofits where dimmer installation isn’t practical
• Rental properties or multi-use rooms

At Leora Lighting, we include step dimming information in the product details where applicable.

What To Look for When Buying Dimmable Lights

• Check the dimmer type: If you’re using LED lights, make sure your dimmer is LED-compatible (often trailing edge or programmable).
• Look for dimming compatibility info: Reputable lighting brands will list compatible dimmers or recommended specs.
• Know your load: Dimmers have minimum and maximum load limits. If your total wattage is too low, older dimmers may not work properly.

At Leora Lighting, we always specify if a product is dimmable — and where possible, we state the type of dimmer it’s compatible with.

What About Smart Home Dimmers?

Smart home dimmers or app-controlled systems can work brilliantly, but compatibility still matters. These systems include brands like Lutron, Casambi, and Rako, and are often controlled by apps, voice assistants, or automation hubs.

If your fittings aren’t designed for these systems, you may run into issues with responsiveness or dimming range.

If you’re planning a smart home setup, choose fittings specifically made for that platform or speak to us for tailored recommendations.

Dimmable LEDs: A Quick Word

Most LED fittings are dimmable only if the driver supports it. So even if a fitting looks dimmable, it may not be unless the correct driver is installed.

Also, dimmable LEDs often have a limited dimming range compared to traditional bulbs (e.g. 20%–100% rather than 0%–100%). Better-quality LEDs offer smoother and deeper dimming.

Avoiding the Flicker Frustration

To avoid flickering or dropouts:

• Use a trailing edge or programmable dimmer with LED fittings
• Stick to reputable brands (both lights and dimmers)
• Match the wattage range to the dimmer’s load capacity
• Don’t mix dimmable and non-dimmable lights on the same circuit

If you're unsure, just ask. We help homeowners, designers, and electricians get it right the first time.

Final Thoughts

Choosing a dimmable light is only half the story — pairing it with the right dimmer makes all the difference.

Whether you're creating ambience in a living room or layering light in a kitchen, smooth dimming can completely change how your space feels.

Explore our range of dimmable fittings or chat with our lighting team if you want help choosing a setup that works seamlessly.