From what you've said, I don't know if you want to go the ENB route, but it's extremely configurable, including day & night point light source intensity, moon & sun intensity, window intensity, and you can disable bloom, sso, etc. entirely if you want.
One that tries to be realistic is Confident ENB: http://skyrimnexus.com/downloads/file.php?id=5253&navtag=file/images.php?id=5253&tab=3
Another good one is Enhanced Shaders: http://skyrimnexus.com/downloads/file.php?id=822
...but you'll have to spend time configuring the enbseries.ini, and possibly the shader files as well if you want to get exactly what you're looking for.