condition	mean	min	max
4 h after light	6.605973333333333	6.44557	6.792730000000001
8 h after light	6.040963333333333	5.9055599999999995	6.28567
12 h after light	6.310496666666666	6.29103	6.32594
4 h after dark	6.8315600000000005	6.68125	7.02923
8 h after dark	6.7826466666666665	6.60285	6.95185
12 h after dark	6.9544999999999995	6.88858	7.02115