condition	mean	min	max
4 h after light	4.075366666666667	4.01394	4.18268
8 h after light	3.928513333333333	3.9168199999999995	3.9469199999999995
12 h after light	3.9207433333333332	3.82957	4.01309
4 h after dark	3.9180466666666667	3.8464	3.9928
8 h after dark	3.91805	3.8706	3.95793
12 h after dark	3.9374200000000004	3.8988300000000002	3.9791800000000004