Board Thread:Manga/@comment-5774380-20160908231942/@comment-26932251-20160909014332

There are a lot of implications to the light bulb I think.

The biggest one for me is that Grisha most likely didn't fabricate it and the wire and the fixtures himself, and the garrison probably would have seen these items on his person when he was first picked up and put into prison. In other words, Grisha has a line on supplies from the outside world.

This is further compounded by the fact that Grisha probably had an electrical source for that light bulb which means that there are still secrets in that basement like maybe a hidden turbine powering a small generator near that river that's always shown in aerial views of Shiganshina.