Now, don't think this is a thing that "OMG I WANT IT OR I'M CLOSING MY ACCOUNT" I was thinking about this while working on my mining.

I thought it might be nice to have a side item like a lantern that maybe you can hold in your off hand. Where it will illuminate a small distance of area around you. Because more than once I've found myself struggling to see in some of the areas I go in. (Even adjusting settings doesn't always help in some areas)

And to make it so that your character can have a hand free to hold their weapon or tool, it's hooked to their belt or something. (So maybe even make it a belt item).