condition mean min max 4 h after light 9.8813185 9.844283 9.918354 8 h after light 9.562002 9.160801 9.963203 12 h after light 9.918354 9.918354 9.918354 4 h after dark 10.001939 9.918354 10.085524 8 h after dark 9.8549355 9.791517 9.918354 12 h after dark 9.774654 9.774654 9.774654