condition	mean	min	max
4 h after light	6.12038	6.0681400000000005	6.1576
8 h after light	6.17953	6.1103	6.222919999999999
12 h after light	6.103269999999999	5.98579	6.1854
4 h after dark	6.21009	6.10047	6.2981300000000005
8 h after dark	6.290736666666667	6.15232	6.39425
12 h after dark	6.371653333333334	6.30414	6.43076