It isn’t that simple…
Let’s start with stepped mode (eco, low, medium, high, turbo). As you can see, only low has a 35kHz (!) modulation, almost sine shaped, thus acceptable snob index.
In smooth mode it gets interesting. Here are eco (hold from off), lowest ramp (ramp down as much as possible, different from eco!) and two higher levels of brightness. The modulation depth decreases as the light gets brighter and the modulation frequency increases. I could go more into detail of how the buck regulator works, but that’s a different topic.
Let’s have a look at the lowest ramp level zoomed out:
Only 900Hz, but the pulses are very short. If you quickly move the light, you can clearly see the typical dotted pattern.