condition	mean	min	max
4 h after light	3.9673066666666665	3.9127699999999996	4.02602
8 h after light	4.03362	3.94944	4.1212
12 h after light	3.944236666666667	3.8894300000000004	3.97563
4 h after dark	4.02129	4.01056	4.038119999999999
8 h after dark	3.9877666666666665	3.75271	4.2125699999999995
12 h after dark	3.9975433333333332	3.96748	4.023569999999999