condition	mean	min	max
4 h after light	8.243795	7.8413	8.64629
8 h after light	8.7821	8.67586	8.88834
12 h after light	8.580684999999999	8.05382	9.10755
4 h after dark	12.1817	11.2568	13.1066
8 h after dark	11.175650000000001	10.4643	11.887
12 h after dark	11.0043	10.8216	11.187