condition mean min max 2 h after light 12.463078333333332 9.80247 18.8389 6 h after light 10.246101666666666 7.22735 12.4884 10 h after light 9.179291666666668 5.32865 16.6138 14 h after light 10.211388333333334 7.00777 16.8993 18 h after light 8.780505 7.75523 10.8831 2 h after dark 15.19775 11.4019 17.6988