LED lighting has become increasingly popular for its energy efficiency and longevity. However, there is a common misconception that LED lights do not flicker as long as the power input remains constant. In reality, all mains-powered light sources flicker, including LEDs. So why do some people believe that flickering LEDs are a problem?
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The Persistence Factor
Unlike incandescent, halogen, and fluorescent lights, LEDs have no persistence. This means that when the power supply to an LED is switched off, the light output stops instantly. If an LED is connected directly to an AC mains-electricity supply, it will switch on and off 50 times per second, which is visible to the human eye.
In the past, this led to LED flickering being a common issue, giving the impression that LEDs flicker more than older light sources. However, this is no longer the case.
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LED Drivers: The Solution to Flickering
Modern LED installations no longer connect LEDs directly to the mains supply. Instead, we now use LED drivers specifically designed for powering LEDs. These drivers convert the mains AC power supply into a direct current (DC) that is suitable for LED lighting.
The key to eliminating LED flicker lies in the quality of the LED power supply. A high-quality LED driver not only transforms the voltage but also ensures a constant current supply to the LEDs. This results in a smooth and flicker-free light output.
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On the other hand, lower-quality LED drivers, often referred to as LED transformers, only convert the current from AC to DC without providing a constant current. This basic form of power-supply conversion can produce an oscillating current that leads to flickering. In the UK, for example, this can result in up to 100 potential flickers per second.
FAQs
Q: Can LED flickering be completely avoided?
A: No, all mains-powered lights flicker to some extent. However, with the use of high-quality LED drivers, LED flickering can be significantly reduced and made practically invisible to the human eye.
Q: Are LED drivers the same as LED transformers?
A: LED drivers, although commonly known as LED transformers, are more than just transformers. They not only step down the voltage but also convert the current from AC to DC and provide a constant current supply to the LEDs.
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Q: Can I use any LED driver for my LED lights?
A: It is important to choose a high-quality LED driver that is compatible with your specific LED lights. Using a lower-quality LED driver may result in flickering issues. It is advisable to consult with a professional to ensure the right LED driver is selected for your installation.
In conclusion, while LED lights do flicker like other light sources, the use of high-quality LED drivers can effectively eliminate visible flickering. By understanding the importance of LED drivers and choosing the right power supply, you can enjoy the benefits of LED lighting without any flickering concerns.
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