condition mean min max 0 h after light 49.7195 49.6362 49.8028 2 h after light 9.820185 9.01837 10.622 4 h after light 9.475455 8.50381 10.4471 8 h after light 12.083005 9.12521 15.0408 12 h after light 20.09755 18.5557 21.6394 2 h after dark 29.93985 24.8158 35.0639 4 h after dark 40.67115 39.8376 41.5047 8 h after dark 69.3458 67.9427 70.7489 12 h after dark 56.28735 54.1907 58.384