condition	mean	min	max
4 h after light	9.190923333333334	9.02229	9.406260000000001
8 h after light	9.14389	8.95781	9.3927
12 h after light	9.19785	9.11064	9.330910000000001
4 h after dark	9.087953333333333	8.80217	9.37314
8 h after dark	9.16068	9.00873	9.296339999999999
12 h after dark	9.079843333333333	8.92902	9.22989