condition	mean	min	max
4 h after light	7.152176666666667	7.0399	7.25777
8 h after light	6.95914	6.85237	7.0942
12 h after light	6.751616666666667	6.67778	6.81169
4 h after dark	6.91256	6.8418399999999995	7.046130000000001
8 h after dark	6.94487	6.82923	7.095269999999999
12 h after dark	7.023583333333334	6.94875	7.06595