condition	mean	min	max
4 h after light	6.405073333333333	6.15339	6.79937
8 h after light	6.338616666666667	6.11734	6.4703800000000005
12 h after light	6.257443333333334	6.03899	6.61985
4 h after dark	6.3466000000000005	6.171930000000001	6.5999300000000005
8 h after dark	6.2780000000000005	5.86049	6.668410000000001
12 h after dark	6.26716	6.06885	6.644819999999999