condition mean min max 4 h after light 316.803846 294.509632 339.09806 8 h after light 295.9729095 267.025515 324.920304 12 h after light 403.004092 324.183732 481.824452 4 h after dark 496.8722555 445.885903 547.858608 8 h after dark 499.2719005 460.770518 537.773283 12 h after dark 410.177991 410.177991 410.177991