condition	mean	min	max
4 h after light	6.12878	5.5722	6.68536
8 h after light	8.830325	8.77764	8.88301
12 h after light	9.24821	9.19516	9.30126
4 h after dark	11.40715	10.4408	12.3735
8 h after dark	8.553165	8.54772	8.55861
12 h after dark	8.537545	8.11789	8.9572