About Flicker

Issuing time:2019-02-28 17:34

As we all know, LED lights are more and more popular with the advantages of energy saving and environmental protection, but if the quality of LED lights is not good, there is a serious strobe. This strobe is undetectable to the naked eye and can easily be ignored by parents and children. LED lights on the market, there may be serious strobe!


1. Where does LED flicker comes from?

Strobe is the depth at which the luminous flux of an electric source fluctuates. The greater the fluctuation of the luminous flux, the more severe the stroboscopic. The depth of the fluctuation of the luminous flux of the electric light source is directly related to the technical quality of the electric light source. Conventional luminaires are powered by alternating current, and their brightness varies with the periodic variation of the alternating current. The strobe of the luminaire is formed by the change of darkness of the light. It is usually divided into two types: one is that the frequency of change is below 100 Hz, and the stroboscopic light can be captured by the human eye; the other is that the frequency of change is above 100 Hz. This strobe will not be seen.


2. What are the potential hazards of stroboscopic effects on the human body?

There are related biological and medical research on the possible damage to the human body caused by stroboscopic:

1). May cause brain cell damage. Some researchers say that by observing EEG, even if the stroboscopic light in the environment is so fast that it is undetectable, the retina of the organism can still resolve and respond to light with a frequency of 100-160 Hz or even 200 Hz. In the animal experiment represented by cats, 100-120 Hz light has caused cell burns in the brain, and the burnt cells belong to the lateral geniculate tissue, which plays a role in controlling the eyeball.

2). May affect reading and vision. Studies have shown that the bright stroboscopic of fluorescent lamps and CRT displays can affect the trajectory of eye movement when people read text. In addition, in some health check reports, visual impairment is caused by stroboscopic fluorescent lamps.

3). Long-term use can cause visual fatigue, and even headaches, especially students, children are more vulnerable. This strobe is undetectable to the naked eye and can easily be ignored by parents and children.


3. How can ordinary people determine whether there is strobe in LED products?

The OHSP-350F Flicker photometer is a portable equipment can carry for site test, it can test scintillation Index, flicker percentage, scintillation depth, flicker frequency, illumination, IES EVE illumination, FFT frequency spectrum, CCT, CRI and etc. And the equipment will prompt risk of flick. However, it focuses on the analysis of stroboscopic data. It can be connected to the PC source to display measurement of flicker frequency, frequency and stroboscopic area waveform.

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