condition	mean	min	max
4 h after light	7.13796	7.02889	7.323589999999999
8 h after light	7.031116666666667	6.85763	7.144819999999999
12 h after light	7.036440000000001	6.769430000000001	7.3517600000000005
4 h after dark	7.160876666666666	7.02497	7.308839999999999
8 h after dark	7.103956666666667	6.999630000000001	7.22273
12 h after dark	7.143013333333333	6.97575	7.3365100000000005