Personally, I like the nights in Gael Serran. It didn't bother me that there was no way to "control" the time of day as in some other games.
There are only a couple of areas in the game where it may make a difference the most notable being west of Ishad N'ha.
Other than that, I'd just cast the best light spell I had available and enjoy the additional creepiness of the night!
On a related subject - I really liked the fact that it isn't necessary to sleep in this game!
Wyv