Hi Lazaro!

That’s not always true, actually. For example, Digital Sputnik lights (and some LED tape that I have that I use my current control dimmers on) utilize current control dimming. This alternative type of dimming allows them to work even with super high speed frame-rates due to having very little or even no perceivable flicker. It’s certainly unpopular in comparison to PWM but definitely not unheard of in the film industry.

I used to use the technique you mention with >2K tungsten lights for footage above 1000 fps. I figured out (in the absence of a budget that could afford a DC rectifier) that if I ran the same amount of lights on each of the legs of a 3 phase Delta style Gennie that they would effectively fill in each others’ pulses. I further enhanced that effect by shining all 6 5K’s (for example) on the same rag.

I used that technique here: https://youtu.be/w9-NoEnWSgk