Flicker in LED lights

Flicker in LED lighting is a well-known challenge in many lighting installations. In this post, our expert divides this phenomenon into two different areas. Flicker can be found in residential and commercial lighting.

In most cases, flickering light can cause headaches and tension in the neck and shoulders. In worst-case scenarios and for longer stays of more than a year, severe flicker can result in long-term loss of concentration and migraines.

Flicker in the light private homeowners

Many homeowners have concerns about using automatic dimmers and LED lights due to flicker issues. Flicker is inevitably one of the biggest issues with LEDs. However, today's LED lights have changed this unfortunate trend, as flicker is almost non-existent with the latest LEDs. Many companies provide energy-efficient LED solutions that illuminate your premises and your home in a way like never before.

Flicker is a constant fluctuation in light output in the transition between on and off. In other words, it is a rapid and repetitive change in light intensity, which is seen as flickering and unstable light. Flicker occurs when the current supplying the light source changes or when the current itself varies.

Flickering LED lights can cause discomfort and headaches as well as eye damage. It can also provoke a feeling of nausea or, in the worst case scenario, cause visual impairment. The retina can detect flicker up to 200 Hz, but research has shown that flicker above 160 Hz can be harmful.

LEDs require significantly less power than traditional light sources. LED lights provide more efficient and long-lasting light than incandescent and fluorescent lights and are also more resistant to flicker, ensuring your health and the safety of your home.

LED uses so-called 'solid-state lighting' (SSL) which is a direct current device. This means that as long as constant power is connected, the LED light will stay on without any chance of flickering. However, in rare cases, there may be fluctuations in the light, which can cause flickering.

Many homeowners are interested in knowing how to avoid flicker in LED lights. A well-designed driver can reduce the flicker that comes from an SSL LED luminaire. The drivers are equipped with capacitors that filter the AC components. The current is therefore filtered, ensuring flicker-free light.

When choosing a flicker-free LED light, compromises are usually necessary. This is because some companies use low-quality capacitors in their LEDs. However, there are still companies that stick to good quality and offer flawless LED light sources.

Flicker in the light in construction projects

In most major construction projects, lighting fixtures are already required to meet a certain amount of flicker, measured as a percentage, in the tender specifications. This section dives into the more in-depth thinking about flicker value and impact.

Flicker in LED lighting refers to the rapid and periodic variations in light emission, typically caused by fluctuations in the electrical current from the driver that powers the LEDs. While LED technology offers numerous benefits such as high energy efficiency and longevity, the issue of flicker has gained attention due to its potential negative effects on human health and well-being.

Flicker in LED lighting can be categorized as visible or invisible, with visible flicker being noticeable to the human eye and invisible flicker requiring specialized equipment for detection. Visible flicker can result in discomfort, eye strain and even headaches for people exposed to it for extended periods of time.

Flicker can be measured with a handheld flicker meter. Image: VISO

To address these concerns, European standards have been established to regulate the maximum allowable flicker in LED lighting. The EN 12464-1 standard, for example, outlines guidelines for lighting in indoor workspaces, setting limits on flicker frequency and modulation depth to ensure a comfortable and visually stable environment. Compliance with such standards is essential to ensure the wellbeing of individuals and promote the widespread adoption of LED lighting technology.

Manufacturers play a key role in complying with these standards, using advanced technologies such as flicker-free drivers and power supplies to minimize the risk of flicker in their LED lighting fixtures. In addition, consumers are encouraged to prioritize lighting products that comply with relevant standards to ensure a healthier and more visually pleasing lighting experience.

In conclusion, while LED lighting offers numerous benefits, managing flicker is crucial to maintaining optimal visual comfort and well-being. By following European standards for maximum flicker in LED lighting, both manufacturers and consumers are helping to create environments that prioritize both energy efficiency and human health.