condition	mean	min	max
4 h after light	6.60498	6.38088	6.83529
8 h after light	6.359936666666667	6.13654	6.6055399999999995
12 h after light	5.042286666666667	5.03543	5.05325
4 h after dark	5.00249	4.93722	5.12023
8 h after dark	5.36653	5.17204	5.59197
12 h after dark	5.253703333333333	5.07846	5.3632599999999995