In today’s lighting market, LED flicker has become a widespread issue. From workplace fatigue to migraines, the consequences of unchecked flicker deserve our attention.
Both the US Department of Energy and the State of California have released reports on the negative effects of LED flicker as well as systems to test and rate LED fixtures for existence of flicker.
This is a guide based on these observations and suggestions, so that you can test LED fixtures for flicker anywhere and easily with just your smartphone.
* Samsung Galaxy S7 and above
* iPhone 6 and above
In your Camera app, switch the mode to slow motion.
Android: "Slow Motion"
To detect strobing, point your camera at the light source without recording.
Strobing will show thick dark lines slowly 'rolling' across the light fixture.
To detect shuttering, record the light source and review the footage.
Shuttering will show the light fixture turning on and off at a rapid pace.
LED Flicker is the repetitive change in magnitude over time, or modulation, of the luminous flux of an LED light source.
Though flicker is often invisible to the human eye, our neurons detect and respond to the sensation.
Source: US Department of Energy (2015)