condition	mean	min	max
4 h after light	6.66005	6.3	7.17197
8 h after light	6.979796666666666	6.62086	7.6714899999999995
12 h after light	6.47098	6.266030000000001	6.78605
4 h after dark	7.071123333333333	6.5631	7.5048
8 h after dark	6.877186666666667	6.47561	7.44888
12 h after dark	6.93667	6.36608	7.676