condition	mean	min	max
4 h after light	6.0484800000000005	6.03196	6.0686800000000005
8 h after light	6.012076666666667	5.9097599999999995	6.163530000000001
12 h after light	6.070226666666667	5.92126	6.15854
4 h after dark	6.077563333333334	6.04764	6.10346
8 h after dark	6.009713333333334	5.926740000000001	6.05486
12 h after dark	6.036020000000001	5.931830000000001	6.14984