Why do some dimmers not work with LEDs?

The downside is that LED bulbs are extremely low-wattage (they use up very little energy), which means leading edge dimmers can't read or control their circuitry very well. Trailing edge dimmers, on the other hand, have a much lower wattage range and can read and control LED bulbs easily and effectively.
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Do you have to have a special dimmer switch for LED lights?

A standard dimmer switch cannot be used with an LED light as you will never be able to dim the LED light either completely or not very well. LED lights need their own special electronic dimmer switch to have a fully functioning and dimming light.
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Do you need a special dimmer to dim LED lights?

Yes, LED lights require a special dimmer. An old fashioned incandescent dimmer switch will not work properly with LED bulbs. You cannot just simply lower the voltage to the LED driver.
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Can you use a dimmer on LEDs?

When it comes to LED lighting people often wonder if LED lighting is dimmable. The short answer to this question is: Yes, LED lighting is certainly dimmable!
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What happens if you put a non-dimmable LED in dimmer?

If you install a non-dimming LED bulb in a circuit with a dimming switch, it will likely operate normally if the dimmer is at its 100% or fully on. Dimming the bulb, will likely cause erratic behavior such as flickering or buzzing and ultimately may cause damage to the bulb.
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Tips for dimming LEDs



Why are some lights not dimmable?

Electric lights (especially CFLs) have a low resistance which means that the floodgates are opened when lights are exposed to the electrical fluctuations that are sent by a dimmer switch, and it can consume more than 5x of the current when it is connected to a dimmer switch which results in overheating of the bulb and ...
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Why do dimmable LED lights flicker?

What Causes Dimmable LED Lights to Flicker? The main cause of flickering with dimmable LED light can usually be traced back to the dimmer switch. Dimmer switches come with a minimum compatible load (in short, the amount of Watts it can process).
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How do I know if my LED is dimmable?

#1 – If you bought a finished LED fixture or bulb, check to make sure the packaging specifically states that it is dimmable. This should be stated in the description or the technical specifications of the light.
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What dimmer switch do I need for LED downlights?

There are two types of dimmer switch available: leading-edge and trailing-edge dimmers. Some retrofit LED light bulbs and fittings have drivers that allow them to work with either type, but for a better chance of the dimmer operating correctly, choose a trailing-edge dimmer.
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Can I use an incandescent dimmer with LED lights?

A standard incandescent dimmer can be used to dim dimmable LED/CFL bulbs; however performance may vary. In some instances, it will work perfectly and in others you may experience issues such as flickering, reduced dimming range and fluttering.
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Are all dimmer switches the same?

Dimmers all perform the same function, altering the illumination produced by the attached fixtures, but there are many types of dimmer switch controls. These traditional switches have a rotating knob that controls the light level. Usually, twisting the knob all the way down turns the connected fixtures off.
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Do you need LED switches for LED lights?

While many LEDs today are dimmable LEDs (not all are) you should still use a special dimmer switch for LED lights in order to avoid some of the common problems associated with incompatible dimmers.
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How do I choose a dimmer switch?

Choose a dimmer with a wattage rating that meets or exceeds the total wattage of all the light bulbs the dimmer will control. For example, if the dimmer controls a fixture with ten 75-watt bulbs, you need a dimmer rated for 750 watts or higher.
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How many LEDs can I put on a dimmer?

Varilight recommend putting no more than 10 LED lamps on one dimmer module. You can put multiple lamps on one plate, so if you have a three gang dimmer plate you can put thirty LED lamps on the plate in total (10 on each module).
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Can LED lights cause a fire?

LED bulbs do not generate enough heat to start a fire. This is because they are designed to use almost all their power sources solely for light emission. Because one of the main reasons for a bulb to catch fire is overheating, LED lights are safer than incandescent lights are.
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What are three types of dimmers?

Different Types of Dimmers
  • Incandescent/Halogen. These types of bulbs require resistive dimmers due to the filaments inside of them. ...
  • Magnetic Low Voltage (MLV) Transformers that reduce higher voltages to less than 30 volts are called low-voltage transformers. ...
  • Fluorescent. ...
  • Light Emitting Diode (LED)
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Can leading edge dimmer work with LED?

Leading edge dimmers are suitable for inductive load, for example magnetic low voltage transformers; and resistive loads like incandescent light bulbs. They are generally unsuitable for LED light bulbs.
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Can I use a dimmer switch on downlights?

One of the advantages of fitting LED downlights is that you can fit LED dimmer switches in order to adjust the amount of light in a room.
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What is the difference between dimmable and non-dimmable LED bulbs?

Dimmable LEDs, on the other hand, have special circuitry inside. This makes them able to respond to changing phase forms that produce the dimming effect. Non-dimmable LEDs are designed to either be fully powered ON or OFF. Its circuitry cannot handle special phase forms.
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Why is my dimmer switch not working?

If your dimmer switch suddenly stops working, there could be issues with the electrical wiring. If it's not installed correctly or the wires come loose, the switch might stop working. You might hear a buzzing or crackling sound if wiring is the issue. When you suspect a wiring issue, hire an electrician to inspect it.
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How do I stop my dimmable LED lights from flickering?

Summary – How to stop LEDs flickering
  1. Always drive LED products using an LED power supply that's designed for the job. ...
  2. Make sure all your LED products are compatible with the control circuits and power supply you're using.
  3. Check for loose wiring and other faulty connections. ...
  4. Consider using a constant-current LED driver.
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How do I stop my dimmable lights from flickering?

Another thing that commonly causes flickering in LED bulbs is loose connections or circuits. This is easy to fix. Just screw the LED bulb in tighter to see of that fixes the problem. If there's a lot of dust in the fixture, first blow out the connection points to remove the dust before putting the bulb back in.
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How do I stop my dimmer lights from flickering?

If flickering happens when using a dimmer switch and replacing the switch doesn't solve the problem, consider upgrading to smart bulbs that don't need a physical dimmer switch. Dimming the bulb directly is more reliable and often solves dimming problems caused by old-fashioned dimming switches or aged wiring.
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Can you make non-dimmable LEDs dimmable?

Simply, you can't dim non-dimmable LED lights. If you use non-dimmable lights in a dimmer circuit, they will either flicker or just run at full brightness.
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