Enhanced Volumetric Lighting and Shadows (EVLaS) Mod
MODSKSE plugin that improves volumetric lighting and shadows by synchronizing them with Skyrim's sun and moon(s)
If the performance impact of the longer shadows is too much, try using a different PerformancePreset (see 'How to Customize').
Keep in mind that the moon sync mode requires active moons in the current climate.

