> Isn’t 5000K very “cold” light? “Cold” lights (above 2700k, the typical incandescent color temperature) have a bad reputation, but 5000K is actually less cold than the sun (which is about 5500-6500K)

I don't think the author is taking into account that a lot of the blue spectrum from sunlight is scattered in the atmosphere resulting in a much 'warmer' light hitting us.