condition	mean	min	max
4 h after light	2.0	2.0	2.0
8 h after light	3.25	1.5	5.0
12 h after light	2.9	2.0	3.8
4 h after dark	2.75	2.5	3.0
8 h after dark	15.4	2.0	28.8
12 h after dark	2.05	1.5	2.6