Dimmable lights are more versatile than non-dimmable lights. Users have the option to adjust the brightness as they need and like.
We are here with a comprehensive dimmable LED light guide. We will explain how it works, different types of dimmable lights, and how you can choose the right one.
Part 1. Are All LED Lights Dimmable?
No, not all LED lights are dimmable. Some LED lights offer a constant output. They are non-dimmable. And some LED lights offer users a choice to select the desired brightness. You can find both types of LED lights in the market.
Part 2. Dimmable vs Non Dimmable LED
The primary difference between dimmable and non-dimmable LED lights is the driver.
A non-dimmable LED light contains a simple and basic driver. It supplies constant current to the LED chips. Even if the input voltage fluctuates, the output is always constant. Thus, a non-dimmable LED light cannot be dimmed.
On the other hand, dimmable LED lights have a special driver that can adjust the current output for the desired brightness.
| Feature | Dimmable LED | Non-dimmable LED |
| Driver | Special driver to adjust the output | Fixed-output driver |
| Brightness | 0-100% or 10-100% | 100% brightness (fixed) |
| Works with | Dimmer switch | Toggle/rocker switch |
| Dimming response | Smooth brightness control | Flickering and buzzing |
| Cost | Comparatively higher | Lower production cost |
Part 3. How Can You Tell If an LED Light Is Dimmable?
While buying an LED light, you can look at a few things to ensure it is dimmable.
The first thing you need to check is the product label. Manufacturers usually mention “Dimmable LED,” “Adjustable brightness,” or “Works with dimmer” to let people know. Look for any of these labels on the package.
Secondly, check the product description. If the light bulb has a specific brightness range, it means it is dimmable. You can also check whether it is compatible with a dimmer. Some bulbs also have smart control features to control the brightness through voice commands and smartphone apps.
If the product is non-dimmable, you will see various warnings on the package, such as “Do not use dimmers.”
Part 4. How Do Dimmable LED Lights Work?
All LEDs require a driver to convert regular electrical current. It’s a necessary component. However, dimmable LED lights work through a special driver that can adjust the power output. The desired brightness is communicated to the driver through the dimmer or app/voice, and then it adjusts the brightness by controlling the current.
Here are the common LED dimming methods.
4.1 Phase-Cut Dimming
Phase-cut dimming is a common residential method. It is done through a dimmer switch.
The input AC voltage to the bulb is cut out or truncated. The dimmer truncates a portion of the 120V/230V sine wave. This cut-out of the phase is detected by the LED driver, and that’s how it adjusts the brightness level.
Phase-cut dimming is further classified into several types.
1) Forward-phase Dimming
Forward-phase dimming involves cutting off the front portion of each half cycle of the sine wave. Once the cycle is cut, the voltage value starts from zero and turns on abruptly. Then, it slowly goes to zero at the end of the cycle. It requires a bidirectional semiconductor switch called a TRIAC. It is a Triode for AC and high-wattage loads.
A TRIAC-compatible driver is necessary in the LED light. Without it, the light will flicker and create a buzzing/humming sound. That’s because of the sudden spike in current.
2.) Reverse-phase Dimming
In reverse-phase dimming, the trailing edge of the sine wave is cut. Therefore, the voltage turns on smoothly from zero to a certain value, and then it abruptly goes to zero. It requires MOSFETs and IGBTs. It’s a perfect option for modern LED drivers.
It offers a smooth dimming phenomenon from 0-100%. There is no buzzing or stressing of electronic components. It also increases the lifespan of the LED driver.
4.2 PWM (Pulse Width Modulation) Dimming
PWM is a very common dimming method in smart LED lights and LED strips. It controls brightness by turning on and off LEDs at a very high frequency.
Even though the LED turns on and off every cycle, the human eye cannot recognize it. The reason is that it is done hundreds to thousands of times per second. Thus, the human eye sees it as a continuous output.
The brightness is controlled by adjusting the duty cycle of the DC input to the LEDs. Suppose an LED is receiving a 100% duty cycle, which means it will always be turned on and offer maximum brightness.
But if the duty cycle is 30%, it means the LED is on for 30% of the period and off for 70%. This time, the brightness will be lower. For maximum brightness, the duty cycle is increased, and to dim the light, the duty cycle is decreased.
Part 5. Can You Dim Non-Dimmable LED Lights?
No, you cannot dim non-dimmable LED lights. They are meant for producing a constant brightness.
You might think about using a dimmer switch with non-dimmable LEDs to control the brightness. However, it is not recommended. If you try to do so, you will experience various problems with the bulb.
Firstly, you will observe flickering and flashing in the light. That’s because the driver in the LED light is not designed to change brightness.
The dimmer will change the brightness a bit, but the control will be very limited. It won’t be a true dimmable light. You can also experience buzzing sounds and overheating, which creates fire hazards.
Lastly, when you try to dim a non-dimmable LED, its life is shortened. It might fail much earlier than expected.
Part 6. Dimmable LED Lights vs Dimmable Smart Light: Which One Do You Need?
| Features | Dimmable LED | Smart LED |
| Brightness Control | Dimmer | App, Voice, and Automation |
| Color changing | No | Millions of color options |
| Automation | Limited | Advanced |
| Requirement | A light fixture connected to a dimmer switch | Works in any light fixture, just need to keep the switch always turned on |
| Cost | $2-6 per bulb | $10-20 per bulb |
A traditional dimmable LED light is controlled with a dimmer switch. You have to manually adjust the dimmer to change the brightness levels. It’s a basic dimmable light with simple technology.
On the other hand, dimmable smart lights are equipped with an internal microcontroller. They receive wireless signals through the smartphone application, voice, or remote control. Once the user sends a signal to adjust the brightness, the controller adjusts the current and voltage. It does not require any dimmer, and it remains turned on. Even if it is off, it is in standby mode to receive signals.
Smart lights give more control to the users. They can change the brightness level from 0 to 100%. Some lights even offer different colors through RGB LEDs. The notable feature of smart lights is automation. Users can set the schedule to turn on/off the light automatically.
Part 7. Different Types of Dimmable Smart LED Lights You’ll Love
Govee offers a massive range of dimmable LED lights. From simple bulbs to ceiling lights and strip lights to wall lights, you can find everything with smart features and incredible functionalities.
Dimmable LED light bulbs: Check out Govee Smart LED Bulbs. You can change the color and brightness level. Enjoy 16 million colors, music sync, and smart controls.
Explore more Govee smart dimmable light bulbs >
Dimmable LED floor lamps &table lamps: You can create the perfect ambiance with Govee Dimmable Floor and Table Lamps, easily adjusting the brightness from cozy and relaxing to bright and focused. Stylish, smart, and versatile, they bring effortless lighting to every moment.
Explore more Govee dimmable floor lamp and table lamp >
Dimmable ceiling lights for bedroom & living room: Choose Govee dimmable ceiling lights to give you flexible brightness control for every moment. Easily adjust the lighting to create the perfect ambiance for working, relaxing, dining, or entertaining. You can choose 16 million colors and 1-100% brightness.
Explore more Govee dimmable ceiling & recessed lights >
Dimmable LED strip lights: COB Strip Light, Neon strip lights and RGBIC LED Strip Light are incredible options. They offer multiple colors, adjustable brightness, and convenient smart controls.
Explore more Govee Dimmable LED strip lights >
Dimmable wall lights: Mini Panel Lights and Glide Hexa Light Panels can decorate your walls. Set the color and brightness to enjoy the ambiance you want.
Explore more Govee dimmable wall lights >
Part 8. Why Are My Dimmable LED Lights Not Dimming?
Common Causes:
- If your LED light is dimmer compatible, make sure you are using an appropriate dimmer. Older dimmers that are designed for incandescent bulbs do not work properly with LED lights. Thus, you need the right dimmer for flawless operation.
- Your LED light may not be dimmable. You need to ensure the driver it contains supports dimming. Otherwise, you won’t experience dimming no matter if you use a dimmer. Secondly, there is a higher chance the light will fail if you try to change its brightness.
- Every dimmer has a minimal load requirement. If the load connected is too low, the resistance of the dimmer will be too high for it. It won’t operate correctly, and you might experience a sudden shutdown of the light instead of dimming. Thus, choose a suitable dimmer and light that can work together.
- If you have selected a poor or non-branded LED light, you will have inconsistent dimming results. The reason is that these lights use low-quality drivers that struggle to regulate the current. Therefore, always go with high-quality LED lights from reliable brands.
FAQs About Dimmable Light
1. What happens if you put a non-dimmable LED bulb in a dimmer?
When you put a dimmer in a non-dimmable LED light, it flickers and starts flashing. Its driver does not support a dimmer, which leads to a buzzing sound and overheating. It badly affects the light's lifespan.
2. Are dimmable LED lights worth it?
Yes, dimmable LED lights are worth it. Users can adjust the brightness as per their needs. If they are working on a task, they can increase the brightness to 100%. And during relaxation hours, the light can be dimmed.
3. Do dimmable LEDs need a special dimmer switch?
Yes, dimmable LED lights need a special dimmer switch that is designed for LEDs (no incandescent bulbs or fans). Secondly, you need to choose the switch according to the wattage of the light.
4. Can you use dimmable LED bulbs in a regular socket?
Yes, you can use a dimmable LED bulb in a regular socket. They come in the same standard base, such as E26/E27 or B22. You can install them in a regular socket. However, to adjust the brightness, the socket must be connected to a dimmer switch.
5. What is a dimmable light bulb?
A dimmable light bulb allows the user to adjust the brightness. Users can change the brightness level as per their needs. Therefore, it is a more versatile option compared to a non-dimmable light.
Conclusion
Dimmable lights offer users the convenience to adjust the brightness. Whether they are doing a delicate task or relaxing, they can adjust the brightness as required. They are much better than non-dimmable lights. And if you are looking for something exceptional, check out Govee smart dimmable LED lights. Not only do they offer adjustable brightness, but also millions of colors and incredible smart features.
