condition	mean	min	max
4 h after light	7.282636666666667	7.0568	7.64248
8 h after light	7.351736666666667	7.131639999999999	7.6086100000000005
12 h after light	7.294029999999999	7.124619999999999	7.468939999999999
4 h after dark	7.279306666666667	6.95535	7.468560000000001
8 h after dark	7.528656666666667	7.23521	7.872380000000001
12 h after dark	7.4212	7.17374	7.74158