condition mean min max 4 h after light 6.36321 2.92189 10.7364 8 h after light 3.997294 0.823422 7.42823 12 h after light 5.57131 2.98991 8.60527 4 h after dark 8.23178 5.1984 10.3762 8 h after dark 7.035776666666667 4.43655 8.67763 12 h after dark 9.069563333333333 7.17026 11.467