I honestly just want a way to see where I am tunneling. So I decided why not suggest Flashlights? I'm thinking the balanced way to make this is have it be on the spade? While I did use search and found a thread about Flashlights and it wasn't strictly about Flashlights, I also read the DNSL and could not find anything about flashlights.
What do you think?
EDIT: Removed Toggle-able seemed too unbalanced.
If this has been suggested many times before please lock/delete this.