condition	mean	min	max
4 h after light	6.49223	6.41306	6.64895
8 h after light	6.38019	6.33611	6.44733
12 h after light	6.585836666666666	6.5252099999999995	6.648560000000001
4 h after dark	6.54843	6.50288	6.6316
8 h after dark	6.512433333333334	6.4824	6.571060000000001
12 h after dark	6.697896666666667	6.5381599999999995	6.9296