condition	mean	min	max
4 h after light	6.2880400000000005	6.21885	6.3808300000000004
8 h after light	6.905616666666667	6.74665	7.10734
12 h after light	6.8069733333333335	6.743810000000001	6.849939999999999
4 h after dark	6.697469999999999	6.5227699999999995	6.80305
8 h after dark	6.580353333333334	6.48345	6.730980000000001
12 h after dark	6.323136666666667	6.21943	6.44687