condition mean min max 4 h after light 1.1136545 0.879709 1.3476 8 h after light 0.6141515 0.538731 0.689572 12 h after light 1.009741 0.791292 1.22819 4 h after dark 1.497535 1.40016 1.59491 8 h after dark 1.1562565 0.944563 1.36795 12 h after dark 1.80213 1.75816 1.8461