condition	mean	min	max
4 h after light	7.0	7.0	7.0
8 h after light	4.75	1.0	8.5
12 h after light	10.7	2.7	18.7
4 h after dark	8.95	2.5	15.4
8 h after dark	21.6	4.6	38.6
12 h after dark	2.05	1.6	2.5