condition mean min max 0 h after light 37.87235 37.642 38.1027 4 h after light 54.89165 52.9122 56.8711 8 h after light 52.45255 48.7134 56.1917 4 h after dark 50.23755 46.4676 54.0075 8 h after dark 48.48945 48.1294 48.8495 12 h after dark 37.88445 34.7312 41.0377