It is pitch black.

You are likely to be eaten by a grue.

>what is a grue?

The grue is a sinister, lurking presence in the dark places of the earth. Its favorite diet is adventurers, but its insatiable appetite is tempered bu its fear of light. No grue has ever been seen by the light of day, and few have survived its fearsome jaws to tell the tale.

>turn on light in basement

*click*