condition	mean	min	max
4 h after light	6.67078	6.38443	6.92488
8 h after light	6.48316	6.1043	6.92546
12 h after light	6.495786666666667	6.14663	6.92442
4 h after dark	6.591523333333333	6.3084	6.94527
8 h after dark	6.5804599999999995	6.41507	6.66817
12 h after dark	6.6758766666666665	6.3162	7.0121899999999995