Is there a flicker issue with higher-end LEDs?

Is there a flicker issue with higher-end LEDs?

• A. Yes
• B. No
• C. Sometimes
• D. Only when dimmed

Answer: (B)

Flicker shows up when the light output changes over time because of how the current is driven. Higher-end LEDs minimize this by using constant-current drivers and dimming methods that switch at very high frequencies or regulate current continuously. When the drive signal operates at high frequencies, the brightness changes are too fast for the eye to detect, so you don’t perceive flicker in normal use. So, with quality LED systems, flicker isn’t a typical issue. It could appear only if a low-quality driver or a dimming method that runs at a low frequency is used.

Flicker shows up when the light output changes over time because of how the current is driven. Higher-end LEDs minimize this by using constant-current drivers and dimming methods that switch at very high frequencies or regulate current continuously. When the drive signal operates at high frequencies, the brightness changes are too fast for the eye to detect, so you don’t perceive flicker in normal use. So, with quality LED systems, flicker isn’t a typical issue. It could appear only if a low-quality driver or a dimming method that runs at a low frequency is used.