condition	mean	min	max
4 h after light	7.104396666666666	7.042389999999999	7.21582
8 h after light	7.0151666666666666	6.9936300000000005	7.030469999999999
12 h after light	7.389103333333333	7.3225	7.450089999999999
4 h after dark	7.8292399999999995	7.573460000000001	7.958489999999999
8 h after dark	7.976956666666666	7.90578	8.02515
12 h after dark	8.25619	8.1991	8.32128