condition mean min max 2 h after light 13.96612 9.10732 19.9227 6 h after light 14.378951666666666 9.58521 23.8224 10 h after light 14.047355 8.20277 24.264 14 h after light 9.30457 5.00624 16.8022 18 h after light 9.683218333333333 5.50707 18.8984 2 h after dark 2.7605916666666666 1.15835 4.74025