condition	mean	min	max
4 h after light	7.87406	7.80947	7.98089
8 h after light	7.606863333333334	7.5320100000000005	7.669160000000001
12 h after light	7.419203333333333	7.400989999999999	7.43752
4 h after dark	7.619213333333334	7.54851	7.711110000000001
8 h after dark	7.50836	7.475789999999999	7.53626
12 h after dark	7.701876666666667	7.53304	7.89438