condition	mean	min	max
4 h after light	7.506896666666667	7.429130000000001	7.56169
8 h after light	7.54646	7.4718	7.657710000000001
12 h after light	7.55835	7.24115	7.752330000000001
4 h after dark	7.78458	7.5598600000000005	7.89922
8 h after dark	7.86567	7.5922	8.02232
12 h after dark	7.980846666666666	7.88663	8.161719999999999