FLICKER PROBLEMS, FLICKER MEASUREMENT, FLICKER EFFECTS
Flicker is the problem certain lights have, exhibiting a subtle pulsating or strobing effect, most of the time barely noticeable by the human eye - however, more organizations are paying attention to flicker because it is being implicated in triggering a host of health related issues such as epilepsy attacks, migraines, fatigue, reduced visual task performance, distraction and visual impairment.Do you see the invisible problem of flicker? OHSP - the handheld spectrometer manufacturer cares the issue that most normally ignored, therefore, OHSP designed a Flicker meter, add Flicker measurement functions to the new generations and invite all lighting experts increase the lighting quality for new LED lights.
The root cause of Flicker
The source of this problem is the power current, particularly a conflict with the mains (from the outlet) and the power supply (of the light). Dimmers also induce or increase flicker. All lights running on AC power have this problem to a certain degree. Fluorescent lights had long been most criticized for high flicker before more recent advances.
LED has Flicker Problem
Now LEDs are also beginning to exhibit the same symptoms. LEDs further complicate the issue with their changing power needs that come with temperature fluctuations. LEDs should be equipped with what is called an LED driver. It sits between the power supply of the light and the light itself. It's main function is to regulate or maintain a constant voltage to the LED - a well designed driver will adequately mitigate the problems of flicker. If an LED is equipped with components for other types of lights (e.g. transformers), this will also cause flicker problems.
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