condition mean min max 4 h after light 5.95045 4.99075 6.91015 8 h after light 5.6593599999999995 5.63067 5.68805 12 h after light 6.232415 5.80453 6.6603 4 h after dark 7.13951 6.89236 7.54447 8 h after dark 8.16998 8.01174 8.2957 12 h after dark 6.728046666666667 6.10995 7.06982