No: the Wikipedia article on lux states that skylight is at most 25,000lx, while direct sunlight can attain 130,000lx. So daylight under ideal conditions is 84% direct sunlight, making sunlight–compared to skylight–a much better approximation of daylight.
I’m not too worried about the distinctions between sunlight/daylight/blackbody radiation–their colorimetric differences are much, much smaller than the difference between a high CRI LED and any of them.
BTW, Wikipedia is being imprecise here:
“The” implies well-definedness and uniqueness, but the article does not state which meteorological conditions are assumed. Tropical clear daylight at noon is certainly very different from daylight at sunset or overcast daylight.
Got it thanks. A question regarding “ideal conditions”, and not nit picking, just want to make sure I understand: I could see it is ratio of max sunlight/max sunlight + max daylight, but why do say this is “ideal”? By definition?
Great question, I was not being clear. Here by “ideal” I meant as little atmospheric filtering as possible, which should correspond to maximum intensity of both direct sunlight and skylight.
On the topic of daylight as distinct from sunlight or skylight, it might be interesting for some here to learn about standard illuminants:
D65 is probably the most commonly referenced, representing a typical mix of sunlight and skylight. Among other applications, it is normally recommend as ambient light while doing photo or video editing, as ambient affects perception of colors being displayed even on emmissive screens.