condition	mean	min	max
4 h after light	7.585326666666667	7.353460000000001	7.948510000000001
8 h after light	7.5612900000000005	7.336360000000001	7.80543
12 h after light	7.556826666666666	7.22624	8.0232
4 h after dark	7.601586666666667	7.3040899999999995	8.14156
8 h after dark	7.554600000000001	7.280410000000001	7.982010000000001
12 h after dark	7.55486	7.37454	7.847689999999999