condition	mean	min	max
4 h after light	7.929633333333333	7.883960000000001	7.95982
8 h after light	7.45322	7.26235	7.5724
12 h after light	6.96893	6.5815399999999995	7.17772
4 h after dark	6.8419099999999995	6.4345	7.190639999999999
8 h after dark	7.41292	7.30388	7.499219999999999
12 h after dark	7.387083333333334	7.31623	7.428260000000001