Install a Dimmer Switch on LED Lights

Have you ever tried dimming your LED lights only to be greeted with an annoying flicker that makes your living room feel more like a haunted house than a cozy retreat?

You are not alone. Many homeowners, contractors, and even seasoned GCs run into the same issue. The good news is that installing the right dimmer switch on LED lights can solve the problem — when done correctly.

In this guide, we will walk through how to install a dimmer switch on LED lights without flicker, explain why not every LED light can be dimmed, and answer common wiring questions.

And if at any point you decide electrical work is better left to the pros (spoiler: it usually is), The Electricians are here to help Colorado homeowners and businesses do it safely.

Why LED Lights Need Special Dimmer Switches

LEDs are not your old-school incandescent bulbs. They use advanced electronics to convert energy into light, which means they require compatible controls. Using the wrong dimmer switch for LED lights can cause flickering, buzzing, or lights that refuse to dim at all.

• Standard dimmers are made for incandescent bulbs. They control brightness by reducing voltage, something LEDs do not handle well.
• LED dimmer switches use different technology. They regulate current in a way that LEDs understand, keeping light output smooth and consistent.
• Not all LEDs are dimmable. Always check the packaging. If the bulb says “non-dimmable,” no dimmer switch in the world will make it behave.

Can You Put a Dimmer Switch on Any LED Light?

Short answer: No.

Only dimmable LED bulbs or fixtures are designed to work with a dimmer. If you try dimming a non-dimmable LED, you could get flickering, buzzing, or premature burnout. Think of it like trying to play a record on a DVD player — the hardware simply is not built for it.

Pro tip: Always pair dimmable LEDs with an LED-compatible dimmer switch. This is the only way to avoid frustration and ensure reliable performance. Read our article ‘can you install a dimmer switch on any light‘ for more information.

Tools and Materials You’ll Need

Before attempting LED dimmer switch installation, gather these essentials:

• LED-compatible dimmer switch
• Screwdrivers (flathead and Phillips)
• Voltage tester
• Wire strippers
• Electrical tape
• Wire nuts
• Your best safety glasses (because electricity deserves respect)

Step-by-Step: How to Install a Dimmer Switch on LED Lights

Important: If you are not comfortable working with live wires, call a licensed electrician. Electricity is not forgiving.

Step 1: Turn Off Power at the Breaker

Never trust just flipping the light switch. Go to your breaker box, find the circuit controlling your light, and shut it down. Use a voltage tester to double-check there is no power flowing.

Step 2: Remove the Old Switch

Take off the cover plate, unscrew the switch, and gently pull it out of the wall box. Identify the wires — typically black (hot), white (neutral), and green or bare copper (ground).

Step 3: Wire the New Dimmer Switch

So, what wire goes where on a dimmer switch? Here is the general breakdown:

• Black (hot) wire → Dimmer black lead
• Red wire (load) → Dimmer red lead
• Green (ground) → Dimmer green lead
• White (neutral) → Connect only if your dimmer requires it (not all do)

Use wire nuts to secure each connection and wrap them with electrical tape for safety.

Step 4: Mount the Dimmer and Replace the Cover Plate

Carefully tuck the wires back into the electrical box, mount the dimmer, and screw the cover plate back on.

Step 5: Restore Power and Test

Flip the breaker back on and test the switch. Your LED lights should dim smoothly without flicker. If they flicker, double-check bulb compatibility and wiring connections.

Common Issues and Fixes

• Lights flicker when dimmed: Your bulbs may not be fully compatible. Swap them for dimmable LEDs listed by the dimmer manufacturer.
• Dimmer feels hot: Most dimmers get warm, but if it is too hot to touch, the load may exceed the switch rating. Upgrade to a higher-capacity dimmer.
• Lights will not dim at all: Check whether your LEDs are actually dimmable. Non-dimmable bulbs will not cooperate.

Do I Need an Electrician to Install a Dimmer?

While many handy homeowners can handle this project, calling a professional electrician is often the safest choice. Here is why:

• Electricity is dangerous and mistakes can lead to shocks, short circuits, or electrical fires.
• A pro ensures the wiring meets Colorado electrical codes.
• An electrician can recommend the right dimmer switches for LED lights in your specific setup.

Bottom line: If you want peace of mind, call The Electricians. We are licensed, insured, and known as Colorado’s trusted choice for safe, reliable installations.

FAQs

What happens if I dim a non-dimmable LED?

You will likely experience flickering, buzzing, or bulb failure. It can also damage the bulb’s internal electronics.

Can I install multiple dimmer switches on the same circuit?

Yes, but you need a special “3-way” dimmer system designed for multi-location control.

Will a dimmer switch save energy?

Yes, dimming LEDs reduces energy use and can extend bulb life. Just be sure your dimmer and bulbs are compatible.

Is a light switch with dimmer more expensive?

LED dimmer switches cost more than standard switches, but the benefits — ambiance, energy savings, and longer bulb life — outweigh the price difference.

Installing a dimmer switch on LED lights without flicker is all about compatibility and proper wiring. Choose dimmable bulbs, use an LED-rated dimmer, and follow safe installation practices.

For Colorado homeowners and contractors who want a hassle-free upgrade, The Electricians are here to make it easy.

Ready to upgrade your home or commercial space with smooth, flicker-free lighting?

Call The Electricians — Colorado’s trusted dimmer switch installation experts today.