Flashing LEDs can be caused by power surges, faulty electrical connections, poor LED quality, or inadequate overload protection.

Selecting high-quality products, regular inspections of the electrical installation and investing in fixtures with high lighting parameters can help avoid problems related to flickering LED light.

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LEDs may flicker due to voltage surges in the electrical network, faulty electrical installation or poor quality products.

Yes, flashing LEDs can cause eye strain, headaches and negatively affect well-being and general health, especially with long-term exposure. Therefore, it is important to use high-quality products and regularly monitor the condition of the lighting.

Light emitting diodes are much more sensitive than traditional light sources. At the moment of a power surge in the electric network, a flickering effect may occur, to prevent it, protective filters are used in the power supplies. When buying LED bulbs, it is worth paying special attention to their quality. Obtaining the highest quality light source will reduce the risk of flickering. The cause of this phenomenon may also be a faulty electrical installation, so it is worth checking it in case of any problems with the LEDs.

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Editor’s Choice articles are based on recommendations by the scientific editors of MDPI journals from around the world. Editors select a small number of articles recently published in the journal that they believe will be particularly interesting to readers, or important in the respective research area. The aim is to provide a snapshot of some of the most exciting work published in the various research areas of the journal.

A long stay in a room where the light frequency is higher than 70 Hz may affect our health and malaise. Installing electromagnetic ballasts in the system reduces the risk of complications. However, we must remember that with the passage of time, the quality of the emitted light deteriorates, and thus its frequency decreases. In addition to frequency, the flicker effect is also influenced by the waveform and the amount of modulation. The following parameters are used to investigate the effects of flicker:

We divide the flickering of light into visible and invisible, consciously perceived by the observer and involuntarily influencing human well-being and health. The effect itself depends on the power supply systems, the quality of current and voltage in the network and the types of luminaire control solutions. Unfortunately, the problem concerns all light sources, both traditional light bulbs and energy-saving LED systems. We can feel the side effects even after a few seconds of exposure to light or after long-term use of a defective source.

Wang, W.; Wang, C.; Liu, J.; Tan, J. Wide-Spectrum Microscope with a Long Working Distance Aspherical Objective Based on Obscuration Constraint. Sensors 2016, 16, 1886. https://doi.org/10.3390/s16111886

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The diode effect is a phenomenon in which LEDs flash or shimmer with light instead of glowing evenly, which can be the result of various factors such as voltage spikes or faulty electrical installation.

Wang, W.; Wang, C.; Liu, J.; Tan, J. Wide-Spectrum Microscope with a Long Working Distance Aspherical Objective Based on Obscuration Constraint. Sensors 2016, 16, 1886. https://doi.org/10.3390/s16111886

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Wang, Weibo, Chao Wang, Jian Liu, and Jiubin Tan. 2016. "Wide-Spectrum Microscope with a Long Working Distance Aspherical Objective Based on Obscuration Constraint" Sensors 16, no. 11: 1886. https://doi.org/10.3390/s16111886

Wang W, Wang C, Liu J, Tan J. Wide-Spectrum Microscope with a Long Working Distance Aspherical Objective Based on Obscuration Constraint. Sensors. 2016; 16(11):1886. https://doi.org/10.3390/s16111886

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Wang W, Wang C, Liu J, Tan J. Wide-Spectrum Microscope with a Long Working Distance Aspherical Objective Based on Obscuration Constraint. Sensors. 2016; 16(11):1886. https://doi.org/10.3390/s16111886

Parameters such as Flicker Percent, Flicker Index and SVM help determine the risk of side effects such as flickering and stroboscopic effects.

Flashing LED street lights can be a problem resulting from poor quality LEDs, a faulty power system, or insufficient overload protection. In case of problems, please contact the appropriate authority or street lighting maintenance company.

Feature papers represent the most advanced research with significant potential for high impact in the field. A Feature Paper should be a substantial original Article that involves several techniques or approaches, provides an outlook for future research directions and describes possible research applications.

Abstract: We present an approach for an initial configuration design based on obscuration constraint and on-axis Taylor series expansion to realize the design of long working distance microscope (numerical aperture (NA) = 0.13 and working distance (WD) = 525 mm) with a low obscuration aspherical Schwarzschild objective in wide-spectrum imaging (λ = 400–900 nm). Experiments of the testing on the resolution target and inspection on United States Air Force (USAF) resolution chart and a line charge-coupled device (CCD) (pixel size of 14 μm × 56 μm) with different wavelength light sources (λ = 480 nm, 550 nm, 660 nm, 850 nm) were implemented to verify the validity of the proposed method. Keywords: wide-spectrum microscope; aspherical Schwarzschild objective; low obscuration; long working distance

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Lighting has a huge impact on our health and well-being. During the day, countless sources of artificial light illuminate our work and leisure places. It is worth paying attention to and investing in luminaires with high lighting parameters that will reduce the risk of flickering or stroboscopic effects.

Flashing LED ceiling light problems can result from a variety of causes, such as low-quality LEDs, a faulty driver, or insufficient surge protection. It is recommended to consult an electrician or replace the lamp with a high-quality product.

Feature papers are submitted upon individual invitation or recommendation by the scientific editors and must receive positive feedback from the reviewers.

In addition to the pulsation of light, there may also be a change in the perception of the visual perception of different frequencies of the light source, the so-called strobe effect. It causes the impression of stopping, slowing down, poses a threat to human health and life. The SVM parameter allows to determine the strobe effect, it is assumed that the SVM value of ≤ 0.4 significantly reduces the possibility of this phenomenon occurring.

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Wang, Weibo, Chao Wang, Jian Liu, and Jiubin Tan. 2016. "Wide-Spectrum Microscope with a Long Working Distance Aspherical Objective Based on Obscuration Constraint" Sensors 16, no. 11: 1886. https://doi.org/10.3390/s16111886

Yes, it is possible to prevent the effect of LED flickering by choosing high-quality products, checking the condition of the electrical installation and using appropriate protection against overload and overvoltage.

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