condition mean min max 4 h after light 501.594828 492.381033 510.808623 8 h after light 478.404447 361.105542 595.703352 12 h after light 393.1190565 357.082979 429.155134 4 h after dark 312.6643915 294.268927 331.059856 8 h after dark 348.43004099999996 329.878904 366.981178 12 h after dark 427.155134 427.155134 427.155134