condition	mean	min	max
4 h after light	7.22142	6.35978	8.08306
8 h after light	6.26219	5.56576	6.95862
12 h after light	5.83881	5.21747	6.46015
4 h after dark	8.75023	8.00012	9.17688
8 h after dark	8.137626666666668	6.85928	8.8869
12 h after dark	7.55995	7.14242	8.09179