Ethan Biery, LED Engineering Leader, Lutron Electronics, recently contributed a very good article to LEDs Magazine about the current struggle to establish good metrics to characterize flicker.
From the article:
The evolution of LEDs in the lighting market has not always been smooth, but the technology has come a long way since the early days. As LED technology matures, each generation raises the bar, driving users and manufacturers to deliver higher performance and more flexible control options. Manufacturers also continue to address customer concerns by improving color quality, product price, lifetime, efficiency, and dimmability. Still, lighting flicker remains as an issue that the industry must fully understand, and account for in solid-state lighting (SSL) and control products, enabling safe and comfortable LED-based lighting for humans.
Click here to read it.