condition mean min max 0 h after light 15.11515 13.9681 16.2622 4 h after light 14.963799999999999 13.7718 16.1558 8 h after light 16.41975 12.2973 20.5422 4 h after dark 23.5915 22.9877 24.1953 8 h after dark 24.26305 22.8714 25.6547 12 h after dark 17.70265 16.9654 18.4399