condition mean min max 2 h after light 11.572 11.0082 11.9615 6 h after light 11.611 10.6088 12.2913 10 h after light 12.8398 11.9606 13.9967 2 h after dark 10.757033333333332 10.1671 11.1893 6 h after dark 10.8376 10.3901 11.5267 10 h after dark 9.1306 9.03481 9.26044