condition mean min max 4 h after light 9.74722222 6.665 11.45333333 8 h after light 9.709444443333334 6.235 13.33333333 12 h after light 8.231111111 6.15 10.94 1.5 h after dark 8.307777777666667 6.68 9.5 5.5 h after dark 8.57888889 7.55 10.02666667 9.5 h after dark 10.384444443333333 10.03 10.95