Flicker is variation in light output over time. In recorded images it may appear as changing brightness, pulsing or bands moving across the frame. A visually steady source can still cause camera artefacts.
What affects the result
The light’s driver or dimming system, camera frame rate, exposure time, sensor readout and operating level all matter. A test at one combination does not establish performance at every other combination, particularly for slow motion or very short exposure times.
Testing a setup
Record a short test with the actual camera mode and lighting settings, including the lowest intended dim level. Review the recording at a useful size. If the fixture offers frequency adjustment or a high-speed mode, compare the result and check any restrictions in its manual.
Practical example
A light that works at 24 fps with a conventional shutter may show bands in a high-speed insert. Changing a fixture mode may help, but can affect other controls. Retest after changing colour, dimming or camera timing instead of relying only on a general “flicker-free” description.
Related terms
PWM (Pulse-Width Modulation) · DMX512 · Lux
References
ARRI: SkyPanel frame rates and high-speed operation · Aputure: LS 600d frequency selection