I'm tweaking up the new lighting files, they look much more crisp and less dark the the original, one of the problem with the original was the transition from day to night, I've gone back to the files I was using in the beta and tweaked them this is the latest file.
You can see the sunset and all the details
This is about as dark the world will get, no lights for being night and the sky in is dark with long shadows, you can still make out details etc.
I will be uploading this soon, probable tonight or Wednesday.