condition	mean	min	max
4 h after light	6.361453333333333	6.27365	6.5358
8 h after light	6.432996666666667	6.2837	6.664680000000001
12 h after light	6.2024	5.95784	6.44286
4 h after dark	6.0758	5.87333	6.28059
8 h after dark	6.078930000000001	5.944030000000001	6.27608
12 h after dark	6.052286666666666	5.91806	6.30275