We accounted for that by calibrating against a halogen desk lamp and my uncle’s welding arc. Anything in between was classified as “solar-adjacent.” Worked fine unless the neighbor lit his barbecue.
lol, sounds like a reddit bot commenting with max snark ;)
The reason for this is not mentioned there, which is that the atmosphere of the Earth acts like a low-pass filter for the direct light that comes from the Sun or from a star, converting the white light into yellowish light. The missing bluish light is diffused over the sky, giving it its blue color. The night sky is also blue, but at a many times lower luminance, so that it seems black.
On the Moon, the Sun will appear as perfectly white.