Understanding how people experience LED-light fluctuation

Light emitted by LEDs can flicker or exhibit a stroboscopic effect, which can lead to annoyance, fatigue and even headaches. Researchers at Eindhoven University of Technology and Signify determined the characteristics of light at which the human eye no longer perceives these unwanted effects. The model developed allows lighting manufacturers to test for these undesirable effects while designing their LED products. Researchers searched for the exact value of specific light characteristics at which the stroboscopic effect becomes invisible to the human eye; the visibility threshold. She invited more than 200 persons, in a simulated office environment, to look at a black disk with a white dot under a LED light source.