How to judge the quality of LED lights

Light is the only light source available indoors at night. In daily household use, the impact of stroboscopic light sources on people, especially the elderly, children, etc. is obvious. Whether studying in the study, reading, or resting in the bedroom, inappropriate light sources not only reduce efficiency, but long-term use may also leave a hidden danger to health.

Lightman introduces consumers to an easy way to verify the quality of LED lights，Use the phone camera to align the light source. If the viewfinder has fluctuating streaks, the lamp has a “strobe” problem. It is understood that this stroboscopic phenomenon, which is difficult to distinguish with the naked eye, directly affects the health of the human body. When the eyes are exposed to the stroboscopic environment caused by inferior lamps for a long time, it is easy to cause headaches and eye fatigue.

The stroboscopic light source essentially refers to the frequency and periodic variation of the light emitted by the light source with different brightness and color over time. The principle of the test is that the shutter time of the mobile phone is faster than the 24 frames/sec continuous dynamic flashing that can be recognized by the human eye, so that the stroboscopic phenomenon that is unrecognizable to the naked eye can be collected.

Strobe has different effects on health. The American Epilepsy Work Foundation pointed out that factors affecting the induction of photosensitivity epilepsy mainly include the frequency of scintillation, light intensity, and modulation depth. In a study of the epithelial theory of photosensitive epilepsy, Fisher et al. pointed out that patients with epilepsy have a 2% to 14% chance of triggering epileptic seizures under the stimulation of scintillation light sources. The American Headache Society says that many people with migraine headaches are more sensitive to light, especially glare, bright light sources with flicker can cause migraine, and low frequency flicker is more severe than high frequency flicker. While studying the effect of flicker on people’s fatigue, experts found that non-visible flicker can affect the trajectory of the eyeball, affect reading and lead to decreased vision.