Pipboy Light Cast Shadows
If you want to improve the way the Pip Boy's light looks and feels at night, take a look at this neat Fallout 4 mod.
The Pipboy Light Cast Shadows mod makes the light brighter while also adding dynamic shadows to enhance the experience.
The result is pretty stunning and a number of people have said that they won't be going back to the vanilla version. It's that good.
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If you want a change of pace, give it a shot. Just be aware that there are a few kinks the developer needs to work out. The same goes for many of these mods.