SteadiHub
2009Cameras (Film/Video/HD) forum

Lighting equipment selection for high-speed video recording at frame rates from 500 to 10000 fps

17 years old. Gear and prices may have changed since.

What the thread found

  • HMI lamps marketed as flicker-free can still exhibit intensity and color variations caused by plasma arc rotation or wobbling inside the bulb, independent of electronic ballast stability.
  • A K5600 Joker 800 watt HMI demonstrated no noticeable flicker when tested at 6200 fps.
  • Bulb age and condition significantly affect flicker performance, and replacing a faulty bulb can eliminate flicker issues that persist across multiple shoots.
  • HMI lamps smaller than 4 kilowatts tend to introduce flicker more readily than larger lamps, though very small lamps with concentrated plasma arcs like the Joker 800 may perform well.
  • Larger HMI bulbs carry a paradoxical drawback: increased gas volume raises the likelihood of plasma disturbances that cause visible flicker.
  • Tungsten lighting can serve as a reliable alternative when authentic flicker-free HMI equipment is unavailable, though it requires wider aperture settings due to lower light output.
  • Dedicated high-speed cinematography lighting heads like those from Dedolight provide concentrated illumination with minimal heat generation.
  • Individual fixture performance varies significantly even among identical models, making testing with the actual equipment planned for production essential.

Depends on

  • Testing of the K5600 Joker 800 was limited to a single frame rate and did not include comparative tests across multiple frame rates.
  • Experience with tungsten alternatives was documented only in a specific geographic region and may reflect local equipment availability rather than universal performance characteristics.
  • The claim about plasma wobbling in HMI bulbs was not experimentally verified in the thread.
  • One participant's reference to an undisclosed high-speed camera model limits the applicability of that experience to unknown equipment specifications.
  • No detailed technical specifications were provided regarding ballast frequencies or their relationship to flicker-free performance.
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