condition	mean	min	max
4 h after light	4.09617	4.04317	4.1435900000000006
8 h after light	4.047763333333333	4.02675	4.0639400000000006
12 h after light	3.92733	3.9081	3.94863
4 h after dark	4.041693333333333	3.98805	4.10847
8 h after dark	4.121086666666667	4.07491	4.15876
12 h after dark	4.15754	4.0987800000000005	4.26957