condition	mean	min	max
4 h after light	7.396929999999999	6.865189999999999	7.72823
8 h after light	7.45042	7.0563	7.80728
12 h after light	7.269279999999999	6.8070699999999995	7.623139999999999
4 h after dark	6.91889	6.588610000000001	7.239489999999999
8 h after dark	6.870036666666667	6.5252	7.26859
12 h after dark	6.929103333333334	6.70657	7.2043800000000005