Great idea and a perfect solution I think. Well done, thanks for reporting this!

So far it looks like a vast majority or players who love this game and want to play this game would prefer to see just a little bit of daylight. Games fail when player feedback and fun factor is foregone for stubborn developer concepts.

While there are certainly lots of players who don't mind the extreme darkness many players who love so much else about the game cannot stand playing in the dark constantly.

Refer to Left 4 Dead night brightness for more accommodating and moderate darkness levels.

Perfect solution would be greatly shortening the day/night cycle time. Day = 20 min, Night = 1 hour.

So far it looks like a vast majority or players who love this game and want to play this game would prefer to see just a little bit of daylight. Games fail when player feedback and fun factor is foregone for stubborn developer concepts.