Download Realistic Lighting Overhaul

If you have no interest in running an ENB, then perhaps you'll be interested in a mod like this. It overhauls the games' lighting system, focusing on realism and immersion. There are hundreds of tweaks and adjustments made to the lighting system in Skyrim, so you should check the screens or give it a test run prior to deciding to give it a permanent place in your load order. Having said that, the changes are very well done--just check the popularity of it. Millions of people using it is hard to deny.

Credits: The Realistic Lighting Team