condition	mean	min	max
4 h after light	7.797853333333333	7.412719999999999	8.01052
8 h after light	7.071186666666667	7.05625	7.09135
12 h after light	7.2603100000000005	7.200410000000001	7.31186
4 h after dark	6.808896666666667	6.78752	6.849289999999999
8 h after dark	7.00992	6.85315	7.15769
12 h after dark	7.208119999999999	7.10307	7.409889999999999