condition mean min max 4 h after light 0.453388 0.361019 0.545757 8 h after light 0.603382 0.515867 0.690897 12 h after light 2.10955 2.07012 2.14898 4 h after dark 3.126755 2.71341 3.5401 8 h after dark 1.841775 1.18269 2.50086 12 h after dark 1.1172905 0.914971 1.31961