Given the rise of Cthulhu in the last competition here's a link to a short story by H P Lovecraft in the early 1900s, the creator (or perhaps reporter) of Call of Cthulhu about a trip into Mammoth Cave.

http://www.hplovecraft.com/writings/texts/fiction/bc.aspx


As they say...
Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn
"In his house at R'lyeh, dead Cthulhu waits dreaming."

Sleep well!

Yes and I spend hours underground on my own!
Mind, I do have a good light.

Is it a Cthulhu Roaster, Roy? 

Mind, I do have a good light.

Click to expand...

Does it meet the following illumination 'requirement':

"We shall see that at which dogs howl in the dark, and that at which cats prick up their ears after midnight."

Maybe there's a reason H E Balch used a candle for illumination....