What Causes Led Lights To Flicker? Find Out Here

All of the sudden, as a homeowner, you noticed that your lights seem to be flickering. At first, you thought it was a problem with your lights; but, when you called your electrical company, they assured you there was nothing wrong with your lights.

Even when you called the electrician, he assured you that there was nothing wrong with the lights. What’s going on? It turns out there are many things that can cause lights to flicker.

The flickering of led lights is a common problem in the industry and is most often caused by a voltage drop in the power supply. A voltage drop is the difference between the sum of the voltage of the supply and the actual voltage measured at the output terminal of the supply.

The led lights continue to flicker even when the voltage rise and fall, which is caused by the electronic circuits and components inside the lights.

Constant current = constant brightness

We all know the magic of LED bulbs. They produce lighting that is not only more efficient, but also more cost effective to run.

They don’t have to be turned on and off like traditional bulbs. They also produce a lot less heat than incandescent bulbs.

LEDs are also environmentally friendly and last longer than standard bulbs.

Constant current is a term used to describe how much power is flowing through an LED driver. For example, an LED driver with a 100mA constant current will have the same brightness as an LED driver with a 1000mA constant current.

But the LED driver with constant brightness is not any brighter than the LED driver with constant current. In fact, the LED driver with constant brightness can be dimmer, since the LED driver must compensate for the voltage drop across the resistor in the current sense resistor.

Types of Flickering

There are several types of flicker, but the one you should be worried about is the kind that causes you to feel uncomfortable, and as a result, you may be more likely to suffer from insomnia, headaches, nausea, and other symptoms.

Flickering lights are one of the most common complaints of light fixtures. They cause a visual annoyance and make the task of doing anything in the light seem less pleasant.

  • Visible flicker

LEDs (light emitting diodes) are a great replacement for old-fashioned incandescent bulbs and are an extremely cost-effective lighting solution. However, the problem with LEDs is that they produce light in a certain frequency range, known as the visible spectrum.

This spectrum of light is actually inaudible to the human ear, so when LEDs are used in a room, they appear to flicker. Although this is not a huge problem for many situations, it can be noticeable for places in which people sit and watch TV, for example.

  • Invisible flicker

When you’re in a dark room and you flick on a nearby lamp and notice the light flicker, it can be disconcerting. It doesn’t have to be.

The human eye can’t detect flicker from more than 30Hz to 100Hz, so if you have a lamp that’s less than 30Hz then you’ll be fine. However, if you have a lamp that’s higher than 100Hz or your TV or display, then you’ll need a flicker-free solution.

Other causes of light flickering

  • Incorrect Dimming

If your lights flicker, you could be experiencing your lights dimming incorrectly. There are many reasons why your lights could flicker such as bad wiring, loose contacts or bad bulbs.

There are also many other reasons why your lights can dim such as temperature, flickering bulbs, bad wiring, and loose contacts.

  • Faulty LED Driver

The issue with LED lights is one of the most common complaints we receive. It is important to understand that a faulty LED driver is not the only problem that can occur with LED lights. In fact, it is a very common problem that causes lights to flicker.

  • Fluctuating Voltage

If you’ve got a power supply with voltage control and you expect it to constantly deliver a steady voltage, then you’re in for a shock. The power supply can normally deliver a constant voltage (usually 15V or 20V DC), however the additional voltage supplied to one output may be lower or higher.

This means that the voltage that appears across an LED or other load can be different at different times, since the voltage across the LED or load can vary.

  • Loose Bulb Connection

Loose bulb connection is a failure of the connection between all of the electrical components in a lighting system.

This may be due to a number of reasons, but the most common is a problem with the connection between the power supply and the power supply terminals on the light fittings.

How to solve LED flickering issues?

LED lighting is now the dominant source of lighting worldwide, and continues to grow in popularity. However, it can be a huge source of frustration for some LED users.

Many LED lights are built with electronic ballasts. Whereas a traditional ballast creates a high voltage and current that fires (or flashes) the LED, an electronic ballast creates a low voltage and current that is fed straight to the LED.

However, this can cause flickering or other LED issues. Doubtlessly, the most commonly used LED lights are the LED Grow, LED Lenser and LED 400W lights.

Flickering is a common problem with LEDs, and there is no perfect solution. Luckily, there are plenty of ways to address the issue. You can buy a new set of LED lighting, or you can try to fix the problem with a few simple DIY tricks.

1. Always drive LED products using an LED power supply that’s designed for the job. Don’t use any LED strips that are driven by mains AC!

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. And make sure your LED dimmers are not overloaded. 

4. Consider using a constant-current LED driver.

5. When installing a dimming system, experiment to see if there’s a minimum dimming level that you shouldn’t go below.

6. For dimming systems, consider using a zero-to-10V or digital volt-dimming system rather than a TRIAC alternative.

7.Using dimmable LED

Some lights flicker when we turn them off and on again. The cause is often poor fixture wiring which is typically not dimmable.

Using dimmable LED rather than standard LED increases the cost by a few pounds, but the extra cost is well worth it: you will stop your lights flicker, which is annoying and can be dangerous.

8. Replacing the driver

This is because the LEDs in the light source (the driver) are driven by a power source (DC power). The amount of flickering is dependent on several factors.

Especially if you notice them only when the room is absolutely dark. It is generally attributed to a faulty LED driver, but there can be other issues that can cause flickering, such as a loose connection between the driver and the LED.

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