condition mean min max 4 h after light 576.0129485 482.024609 670.001288 8 h after light 638.3533945 558.397809 718.30898 12 h after light 663.566988 565.500095 761.633881 4 h after dark 918.246325 594.757789 1241.734861 8 h after dark 948.3098115 702.208982 1194.410641 12 h after dark 540.372932 540.372932 540.372932