I tried playing with vanilla lighting again, and I just can't anymore after playing with this mod. The way Geralt (and his hair) is shaded/colored, the way NPCs don't look out of place, the distant LOD, the way the colors of sunrises and sunsets affect Geralt and the environment make it look pretty close to some early-mid 2014 screenshots, mostly everything is so much better and I can't go back.
I'm really hoping they release that updated modkit (or was that a rumor?) soon, so Essenthy could hopefully iron out some issues (like AO still, shadowed forest areas look a bit weird, when it rains it goes back to vanilla lighting, and there's not many different weather conditions I think, although I'm not sure if the last one can be fixed).
Using the default version.