My gf makes me add this mod to every pack we play.

Really makes your builds feel magical, the crafting recipes may not be the most intuitive at first, and there are some features like twinkling that aren't really explained, but I think the recipes make up for it by being fun and adding a lot of charm to the mod.
The mod is surprisingly versatile, it's more then just night lights, but hanging chevrons, or just the empty hanging strings can add a lot to a build and fit with a variety of aesthetics.
Super customizable and fun to use, highly recommend.