Stadium Light.
M and I were driving by the local college's outdoor fields, fully lit but with no players, and marveling at the light. Deep night all around and there is that bright-as-day field. But it's weird, there are no shadows, or lots of faint, little shadows which is wildly unnatural. At 45 degrees latitude, there are only 2 days a year when the sun hits the true zenith, which would give the brightest daylight and the smallest shadow, although that shadow would be very dark if the day's really clear.
To get shadowless daylight, it's either cloudy or magic hour, both of which would have pretty different color temperatures compared to the stadium. The HMI lighting would be extremely hot, but the color-temp must be kind of “paper white.” 4-5000 K? Magic hour hasta be a around 9000 at least when you're in the tree-lined streets. (My guesses here, gentle reader.)
The point is, the more you examine that brightly lit field, the more interesting it gets. Fractal fascination, I'll call it, you just keep looking closer and getting more for the effort. Is this what the ancients thought about astronomy?
Anyway, next time you see a stadium, especially at dusk, take the opportunity to marvel at the quality of the light.