I like the idea of night, but understand that the reason it was done away with in the first place was that you could simply shift the gamma and it was like seeing in daylight anyway. The players that did not know this trick were at a serious disadvantage.
Maybe a simple way to implement "night" would be for all icon ranges to be cut in half when the moon rises. You can lower ambient light, but I still think the gamma correction will give some players an advantage (especially those of us with big graphics cards).
