condition	mean	min	max
4 h after light	7.00737	6.782960000000001	7.16378
8 h after light	7.009613333333333	6.7528	7.25678
12 h after light	7.072946666666667	6.9874600000000004	7.13961
4 h after dark	7.01854	6.87516	7.2053899999999995
8 h after dark	7.069403333333333	6.93325	7.165439999999999
12 h after dark	6.827446666666666	6.7829	6.88965