LED Up-lights Interfere with HD Video?

[DJRog]

Does anybody know if LED up-lighting can interfere with HD video? I have the Chauvet slim par 56s

 

[steve149]

Does anybody know if LED up-lighting can interfere with HD video? I have the Chauvet slim par 56s

I don't think so. Most camera issues are due to the 60Hz AC cycling through incandescent filaments. LEDs are DC driven, so don't have the same issue.

 

[drzinc]

LED light fixtures can flicker. The reason for this is, in order to dim leds the led driver is actually sending it a fast on and off signal (pulsing frequency). Our eyes can not see it but a video or still camera can see this flicker with faster shutter speeds.

 

[steve149]

It looks like Dave is onto something there. A quick search shows that there is no real standard in the industry as to how often to cycle the LEDs and how many cycles are off to represent a dimmed condition (actually handled by widening and narrowing the pulse width). Apparently, the better units do it much faster and with less noise than the top end of 60fps of video, so you won't normally see it. Cheaper LED units are probably more suspect as they typically use a cheaper power supply.

If you shoot at film speeds (24 fps) or at 30fps, you shouldn't have an issue, but it looks like a lot depends on what the lighting is.

 

[Randy A]

I've had a few videographer friends mention the flicker, but they easily compensated with some camera adjustments.

 

[rickryan.com]

Rog, I take it you ran into a videographer trying to blame you for messing up his/her video?

 

[DJRog]

Thanks for the info Zinc!

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Hey guys! Thanks for the great info. Yeah, Ricky a videographer spooked one of my brides...then tried to refer his lighting guy. Funny. Again, thanks for the help. much appreciated!!