Yes, it does, but, in TV, it's quite short relative to the retinal persistence. That's why some people are acutely aware of the inherent "flicker" while most don't see it at all. This was particularly painful when video games that used interlace became popular. I'd guess Erik Malund knows more than most of us about this effect with LED's.

I'm trying to get Erik Malund to tell us what he knows about LED's of this type. After all, he works with this technology all the time.

The type of LED's with which I originally worked took microseconds, or at least the major part of a microsecond to "light up" and didn't "light up" fully for several microseconds. Further, their behavior was not in any sense linear with current or voltage.

RE