condition	mean	min	max
4 h after light	6.474843333333333	6.30928	6.60755
8 h after light	6.37967	6.15722	6.71687
12 h after light	6.29897	6.07374	6.55582
4 h after dark	6.459796666666667	6.2865400000000005	6.758380000000001
8 h after dark	6.505496666666667	6.31755	6.84468
12 h after dark	6.53113	6.21269	6.7262699999999995