condition	mean	min	max
4 h after light	7.859226666666667	7.802510000000001	7.9595
8 h after light	7.77642	7.673710000000001	7.90015
12 h after light	7.927843333333333	7.89925	7.961239999999999
4 h after dark	8.160046666666666	7.99833	8.31822
8 h after dark	8.3435	8.10397	8.54315
12 h after dark	8.38587	8.30662	8.46508