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do old dimmer switches work with led bulbs

by Devon Gleichner MD Published 3 years ago Updated 2 years ago
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Can You Use Old Dimmer Switches with New LED Bulbs? You can, but the results may not be what you want. Most dimmer switches were designed to work with filament lamps and incandescent bulbs. An LED bulb works differently.

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.

Full Answer

How do I know if my dimmer switch is LED compatible?

The best way to see if your current dimmer is LED compatible is to check the minimum and maximum load range of the switch itself. And also consider what we've discussed about the most common dimmer types: Trailing Edge Dimmers: Specifically designed for LED bulbs due to low wattage capabilities.

What kind of dimmer switch do I need for LED lights?

Trailing edge dimmers work best with LED light bulbs and leading-edge dimmers work best with traditional incandescent and halogen light bulbs.

What happens if I use an LED bulb in a dimmer?

Existing dimmer switches often have a minimum power of 50W, but because LED lights tend to have lower wattages than the standard bulb when a bulb is connect to that dimmer switch it will not reach the minimum power required and would usually confuse the dimmer switch and the lights start to flicker, make buzzing noise ...

What happens if you use non dimmable LED bulb in a dimmer?

So, what happens if you use non-dimmable LEDs on a dimmer? Well, at best the bulb just won't dim properly. At worst, though, you might damage the bulb. You see, dimmable LEDs have special circuitry inside that allows them to respond to varying current levels or “pulsing” current waves to produce a dimming effect.

Why are my LED lights flickering on a dimmer switch?

put simply, LEDs flicker when their light output fluctuates. This fluctuation happens because your dimmable light-emitting diodes are designed to switch on and off at very high speed.

What is the difference between LED dimmer and incandescent dimmer?

Unlike traditional lighting such as incandescent, dimmable LED bulbs don't rely on voltage to dictate their level of brightness. Instead, they essentially rely on a cycle of being on and off. These cycles operate in a matter of milliseconds, so you won't be aware of them actually turning on and off.

Do you need a special dimmer switch for LED bulbs?

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.

Why do some dimmers not work with LEDs?

Typically, LED dimming problems occur because the left hand doesn't know what the right hand is doing or, more specifically, the LED lamps aren't in sync with the controls, or dimmer switches. In order to get LED lamps to dim, you need a proper pairing between the lamp and the controls.

Do LED lights use less power when dimmed?

Yes. The brighter an LED is, then the more energy it is using. Therefore a dimmed LED is using less energy than an identical LED running at full brightness.

Can I use non-dimmable LED with dimmer switch?

You should NOT use a non-dimmable lamp in a dimmable circuit as it may cause damage to the lamp and or circuit.

How do you make LED lights dimmable?

Simply connect the two output wires from the power supply to the dimmer unit, and then the two input wires from the LED strip. The dimmer simply acts like a valve, and the power supply unit will automatically provide the rated current and voltage to depending on the dimmer's knob position.

Can dimmable LED lights be used without a dimmer?

The short answer to this question is: Yes, you can use dimmable LEDs without a dimmer switch, just like normal light bulbs. This is handy to know because many retailers are reducing the number of non-dimmable LED bulbs that they stock.

How do I choose a LED 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.

How do you make LED lights dimmable?

Simply connect the two output wires from the power supply to the dimmer unit, and then the two input wires from the LED strip. The dimmer simply acts like a valve, and the power supply unit will automatically provide the rated current and voltage to depending on the dimmer's knob position.

Is there a difference in dimmer switches?

Dimmers come in many different colors and styles, so it's all a matter of personal preference. The styles of the dimmer switches are varied and come in options as varied as toggles, rotaries, and even touch-sensitive dimmers.

What is the difference between leading and trailing edge dimmer?

Leading edge dimming cuts of the front edge of each waves' half cycle. Conversely trailing edge dimming cuts out the second half of each waves' half cycle. Trailing edge dimmers are now the more popular of the two types.

What is a leading edge dimmer?

Leading Edge. Predominantly used with incandescent or mains halogen light bulbs, leading-edge dimmers are compatible with resistive or inductive loads and can reduce the load by shortening the cycle at the leading edge of the input waveform.

How does trailing edge dimming work?

Trailing edge dimmers are designed to fade the voltage to zero rather than switch it abruptly off, by applying resistance to create a ramp. This increases the amount of heat dissipated since the resistive period generates heat.

Can LED light bulbs work with dimmer switches?

It is worth mentioning at this point that all manufacturers state that their LED light bulbs are designed to be compatible with the majority of common household dimmer switches but they cannot 100% guarantee that they work with them all as there are so many makes and models on the market today. 4.5.

Do LED bulbs work with trailing edge dimmers?

Manufacturers have designed their LED light bulbs to be compatible with the majority of common ‘trailing edge’ household dimmers. Trailing edge dimmers are slightly more complicated and more expensive than the ‘leading-edge’ versions but they have many more desirable features such as smooth control, silent running, soft start and multi-way dimming that greatly enhance the life of the LED light bulbs. For a more comprehensive rundown of dimming and dimmer switches in general, check out our Dimming for Dummies guide.

How to put LED light on dimmer?

The easiest way to put an LED light bulb on a dimmer circuit is to use a bulb that's compatible with standard (incandescent) dimmers. Start with one bulb and see how well it works on your dimmer. Try another brand and type if the first one doesn't work. Another option is to replace your old dimmer switch with a LED-compatible dimmer.

How much power does an LED bulb use?

LED bulbs produce a large amount of light using much less power, reducing your electric bill. Creating a bright 2,600 lumens of light, for example, requires an incandescent light that uses 150 watts of power. You can achieve the same amount of light with an LED bulb while using only 25 to 28 watts of power. So LED bulbs are indeed worth buying, but ...

Do you need a dimmable LED bulb?

If you have LED under-cabinet or recessed fixtures, you may need an electronic low-voltage dimmer (ELV) or a magnetic low-voltage dimmer (MLV).

Do LED bulbs work with dimmer switches?

By contrast, many LED bulbs won't work with standard dimmer switches— the kind you most likely have in your house.

Can LED lights be used with dimmer switches?

LED light bulbs can be used in light fixtures controlled by dimmer switches, but you may well find that traditional dimmers may not work—or may work inadequately —with some LED bulbs. The bottom line is compatibility. Some LED bulbs are designed for use with standard dimmer switches, while others are not.

Do LED bulbs dim?

Incandescent bulbs tend to emit a warmer, softer glow as they dim, but with LEDs, the color temperature doesn't change with dimming, so you may not get the softer ambiance you're looking for. Some LED products, however, simulate this effect by combining diodes of different color temperatures in the same bulb.

Is It Worth the Switch?

Given the need to pair dimmers and LED bulbs that are compatible with each other, you may be wondering if making the switch is worth the effort. It undoubtedly is. LED bulbs produce a large amount of light using much less power, reducing your electric bill. Creating a bright 2,600 lumens of light, for example, requires an incandescent light that uses 150 watts of power. You can achieve the same amount of light with an LED bulb while using only 25 to 28 watts of power.

Do LED lights work with dimmers?

However, one common question is “Do LED lights work with dimmers?” Unfortunately, the answer is yes and no, and the explanation for this is a bit complicated.

Can LED lights be dimmed?

You will hear it said that LED lights do not lend themselves easily to dimmers, which is quite true. If seeking a dimmer switch that will work with existing LED lights already installed, it is essential to read the packaging that came with the lamps to see what dimmers have been manufactured to work with that specific brand of LED light. If, on the other hand, the dimmer switch is already installed, Cree true dimmable LED lights are the solution.

How does a dimmer affect the light output?

By altering the amount of power delivered to a light source, a dimmer directly affects the level of the light output from that source. The more power delivered, the higher the light output. The less power delivered, the lower the light output.

What is the difference between an incandescent rated dimmer and a magnetic rated dimmer?

So the difference between an incandescent rated dimmer and a magnetic rated dimmer is the ladder’s ability to perform without detriment to the transformer -they are both forward phase dimmers.

How does a resistor affect the energy of a light bulb?

And when you put a resistor in a series circuit, the resistor’s energy consumption makes a voltage drop in the circuit, decreasing the energy available to light bulbs.

How to change the resistance of a resistor?

You alter the total resistance of the resistor by adjusting the distance that the charge has to go through a resistive material. If the contact arm is to the left, charge running through the circuit simply has to travel through a little bit of resistive material. If the contact arm is all the way to the right, the charge has to pass through more resistive material.

What happens to DC components in a transformer?

So that any DC component the power delivered is within the tolerance of transformers, and out of tolerance, DC component would cause the transformer to saturate, leading potentially to its failure.

What is indirect dimming?

A light source that includes indirect dimming capability will be looking for a variable control signal, separate from the power delivered, that power typically being switched on and off by the controlling dimmer, in addition to the variable control signal.

What happens if the control signal received is 10 volts?

If the control signal received is 10 volts, the device causes the light output, to go to its full-on value.

What voltage is a dimmer switch?

The dimmer switch is rated for the same voltage as the lighting application. Use standard dimmers on 120 line voltage and low voltage dimmers for 12V and 24V applications.

How to check if a light bulb is compatible with a dimmer?

The easiest way to ensure that your light bulbs and dimmer controls are compatible is to check the lamp's manufacturer spec sheet or dimmer compatibility sheet. At 1000Bulbs.com, these PDFs available under Brochures & Spec Sheets on the lamp's product page. If you have a dimmer switch already and are looking for new bulbs, check to see that the dimmer is listed on the PDF prior to purchasing the bulbs. If you already have light bulbs and are looking for a dimmer switch, find the product page for the bulbs and check the PDF for a list of compatible dimmers to choose from. The specific dimmer compatibility information will always be with the bulbs rather than with the dimmer.

What voltage do LED lights use?

Fixtures setup for 0-10V dimming have a third wire that applies a direct current voltage (DC) between 0 and 10 Volt s to vary the intensity of the light. For a fixture to be compatible with 0-10V dimming, it needs to have a 0-10V LED driver. This may be included in the fixture, or external as is the case with LED tape light. In many cases, if the fixture is compatible with 0-10V dimming, you can use any 0-10V dimmer compatible with that technology. Because 0-10V dimmers all work the same way, some products are compatible with all 0-10 Volt dimmers. If this is the case for a product listed on 1000Bulbs.com, we write this in the description, but you can also find it on the PDFs as well.

What is dimmer compatibility?

The specific dimmer compatibility information will always be with the bulbs rather than with the dimmer. If your dimmer isn’t listed on the dimmer compatibility sheet, don’t lose hope. The compatibility sheet will often list common dimmers or whole lines of dimmers by the manufacturer part number or catalog code.

What is needed to dim low voltage bulbs?

When dimming low voltage bulbs, a magnetic or electronic transformer is needed to step down the voltage. What dimmer you need is determined by the transformer. Do not mix magnetic and electronic transformers or dimmers on the same circuit. Use magnetic low voltage dimmers with magnetic transformers and electronic low voltage dimmers ...

How many watts does a 600 watt dimmer need?

For example, a 600 Watt incandescent dimmer can support up to eight 75 Wat t bulbs. LED and fluorescent dimming works a little differently.

Why is my fluorescent light flickering?

If you've just replaced fluorescent lights and the new lights are also having trouble, but you're sure the lights and dimmer are compatible, a plausible cause is the ballast in the fixture is nearing the end of its life. The symptoms of a bad ballast also include flickering and humming, so if everything is compatible, hiring an electrician is the best next step. We've also had cases where the fixture was running on a higher voltage than indicated by the socket, which brings us to low voltage dimming.

What color does a dimmer switch turn?

If you’ve ever used a dimmer switch, then you might have noticed that the bulb changes color from white to yellow as it gets dimmer.

How Do Dimmers Work?

Dimmers work by adjusting the voltage that’s sent to a bulb. They do this by altering how much power gets through, based on how dim or bright you want the light in your home.

What bulbs are used for dimming LED lights?

3. LED lights that are installed in dimmable fixtures must be replaced with LED bulbs designed for dimming, like the TriLite® Control-LED.

How many diodes does an LED bulb have?

1) All LED bulbs usually have six small diodes on their base. These diodes help to convert electricity into light. When you dim a LED bulb, it just lowers its brightness and does not dim or change the color of these diodes.

What is an incandescent dimmer?

An incandescent dimmer is a great way to control the light in your home. It gives you the options to set different levels of brightness from high to low.

Why are LED bulbs better than other types of lights?

As a result, they won’t get damaged easily, and even if somehow damaged, you can replace them easily.

Why does my LED bulb look brighter when dimmed?

That is why when you dim an led bulb, the same appears brighter than before because there are no changes in its lighting capacity or color.

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