condition mean min max 0 h after light 3.11131 2.84351 3.37911 4 h after light 4.01987 3.84191 4.19783 8 h after light 3.9673249999999998 3.34707 4.58758 4 h after dark 4.18984 4.18158 4.1981 8 h after dark 4.52683 4.1615 4.89216 12 h after dark 4.2514899999999995 3.9145 4.58848