How much can you actually cover? I've done solitary stretches over 30 days more than once and while I don't like confinement, it's tolerable. That much darkne

How much can you actually cover? I've done solitary stretches over 30 days more than once and while I don't like confinement, it's tolerable. That much darkness is a big unknown, but I've always rather enjoyed the darkness. Perhaps the stint as an astronomer sufficiently prepared me for this challenge.