I hate to nitpick, but they are in fact meant to "look like the sun" due to the fact that most monitors generally run at a color temperature of 5500K which is (

I hate to nitpick, but they are in fact meant to "look like the sun" due to the fact that most monitors generally run at a color temperature of 5500K which is (approximately) the same color temperature of sunlight. When set to a "night" setting it isn't creating an "overcast", it is merely changing the color temperature of the monitor to something more in line with moonlight (4100K) or lamp (3400K) light sources, something you could do manually by adjusting your monitor settings.