condition	mean	min	max
4 h after light	6.3175300000000005	6.194380000000001	6.4157
8 h after light	6.310536666666667	6.16655	6.5360000000000005
12 h after light	6.19135	6.02043	6.3293800000000005
4 h after dark	6.259533333333334	6.1953	6.34992
8 h after dark	6.1836	6.06605	6.26021
12 h after dark	6.116256666666667	6.05711	6.16432