condition mean min max 4 h after light 1.0928775 0.902165 1.28359 8 h after light 1.59593 1.56692 1.62494 12 h after light 2.556375 2.28144 2.83131 4 h after dark 3.13263 3.07358 3.19168 8 h after dark 2.03088 2.0219 2.03986 12 h after dark 1.863925 1.82567 1.90218