Flicker (light)

Flicker (light)

Flicker is a fluctuation in light intensity that can lead to several problems such as reduced visual performance and comfort, interference with tasks, and in some cases, can even cause photosensitive epilepsy. It is a common issue in artificial lighting and can be caused by a variety of factors including the type of light source, the power supply, and the installation method.

Causes

Flicker can be caused by a variety of factors. The most common cause is the alternating current (AC) power supply used in most homes and businesses. This can cause the light intensity to fluctuate at a frequency of 50 or 60 Hz, depending on the region. Other causes can include the type of light source, such as fluorescent lamps or LED lamps, and the installation method.

Effects

The effects of flicker can vary depending on the frequency and intensity of the flicker, as well as the individual's sensitivity to it. Some people may not notice flicker at all, while others may find it extremely bothersome. In some cases, flicker can even cause photosensitive epilepsy, a condition where flashing lights can trigger seizures.

Measurement and mitigation

There are several methods for measuring and mitigating flicker. One common method is to use a flicker meter, which can measure the frequency and intensity of the flicker. Another method is to use a flicker-free light source, which can eliminate flicker entirely. Other methods can include adjusting the power supply or the installation method.

See also

• Light pollution
• Light therapy
• Photosensitive epilepsy

References

Flicker (light) Resources
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